<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0016-7169</journal-id>
<journal-title><![CDATA[Geofísica internacional]]></journal-title>
<abbrev-journal-title><![CDATA[Geofís. Intl]]></abbrev-journal-title>
<issn>0016-7169</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geofísica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-71692020000300169</article-id>
<article-id pub-id-type="doi">10.22201/igeof.00167169p.2020.59.3.2093</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Identificación de las fuentes de nitratos mediante métodos hidrogeoquímicos e isotópicos en el agua subterránea del Bajío Guanajuatense]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Arredondo]]></surname>
<given-names><![CDATA[Ivan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Ocampo]]></surname>
<given-names><![CDATA[Itzamna Zaknite]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Armienta]]></surname>
<given-names><![CDATA[María Aurora]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morán-Ramírez]]></surname>
<given-names><![CDATA[Janete]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Hernández]]></surname>
<given-names><![CDATA[Mario Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Landa-Arreguin]]></surname>
<given-names><![CDATA[Jorge Federico]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UNAM Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,UNAM Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>59</volume>
<numero>3</numero>
<fpage>169</fpage>
<lpage>194</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-71692020000300169&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-71692020000300169&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-71692020000300169&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La subprovincia del Bajío Guanajuatense, ubicado en el Centro de México es una de las zonas agrícolas más importantes del país, lo cual ha provocado el uso de grandes volúmenes de agua. El panorama actual de Guanajuato indica un incremento, en más del triple, del uso del agua subterránea respecto a la extraída hace 30 años, usada para maximizar el rendimiento de cultivos, así como una aplicación desmedida de fertilizantes nitrogenados. Este contexto se torna más grave dado que en la zona de estudio existen problemas de sobreexplotación, abatimiento del nivel estático, y presencia de fallas y fracturas, y aunado a ello contaminación en distintos niveles de profundidad del acuífero por compuestos nitrogenados. El objetivo de este trabajo consistió en evaluar la presencia de compuestos de nitrógeno en los distintos flujos del acuífero, identificar isotópica e hidrogeoquímicamente las fuentes, sus transformaciones y los procesos relacionados con el elevado contenido de NO3 - en el agua subterránea. Con base en los resultados obtenidos de NO3 -, elementos químicos mayores, menores, traza e isótopos, se han identificado dos fuentes de contaminación; una relacionada con la agricultura y la segunda con el tratamiento de agua residual. Esto ha ocasionado que el contenido de NO3 - supere los valores permitidos por la NOM-127, de acuerdo a los datos de muestreo del 2017 y 2019, no solo en el acuífero somero también el profundo. Se llevaron a cabo dos campañas de muestreo de agua subterránea en 32 pozos urbanos y agrícolas de los municipios de Vill y JR en Guanajuato, en temporada de lluvias y de estiaje, siguiendo métodos nacionales e internacionales. Se determinaron elementos mayores, menores y algunos elementos traza, así como isotopos estables. El origen de los elevados contenidos de NO3 - es antropogénico; los valores más elevados se cuantificaron en época de estiaje. Los nitratos migran más fácilmente a través de fallas y fracturas profundas, principalmente en la zona centro-sur del área de estudio hacia el acuífero medio y posiblemente al profundo, este proceso es relevante ya que la zona es reconocida como un medio impermeable debido a la presencia de extensas capas de arcillas. Una planta de tratamiento de agua residual es un foco de contaminación, la aplicación de fertilizantes sería el otro posible foco de contaminación. La transformación de los compuestos nitrogenados pudieran afectar el comportamiento isotópico del &#948;18O, aunque no se descarta que podría deberse a procesos de evaporación e infiltración de agua somera. Esta información debe ser considerada ya que la presencia de nitratos en el medio pudiera poner en riesgo la salud de la población que se abastece del mismo sistema acuífero donde se desarrollan estas actividades.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The sub-province Bajío Guanajuatense is located in Central Mexico, is one of the most important agricultural areas in Mexico, where are used large volumes of water. The current panorama of Guanajuato shows an increase of more than three times in the use of groundwater, compared to extraction 30 years ago; this water is used to maximize crop yields; another problem that has increased is the excessive use of nitrogen fertilizers in all the area. This context becomes more serious considering that in the study area, occurs problems of overexploitation, depletion of the piezometric level, presence of deep faults and fractures, coupled with contamination at different levels of the aquifer by nitrogen compounds. The objective of this work is to evaluate the presence of nitrogen compounds at different depths of the aquifer, in addition, to identifying isotopic and hydrogeochemical sources, their transformations and the processes related to the high NO3 - content in groundwater. Based on the results obtained from the concentration of NO3 -, major, minor chemical elements, trace and isotopes, two sources of pollution have been identified; one related to agriculture and the second to wastewater treatment, This has caused that NO3 - content exceed the values allowed by NOM-127, according to the sampling data of 2017 and 2019, not only the shallow aquifer is polluted, also the deep. Two groundwater sampling campaigns were carried out in 32 urban and agricultural wells of the municipalities of Vill and JR in Guanajuato, in rainy and dry season, following national and international methods. Major, minor and some trace elements were determined, as well as stable isotopes. The origin of the high content of NO3 - is anthropogenic; the highest values were quantified during the dry season. Nitrates migrate more easily through faults and deep fractures, mainly in the central-south zone of the study area to the middle aquifer and possibly to the deep one, this process is relevant since the area is recognized as an impermeable medium due to the presence of large layers of clays. A wastewater treatment plant is a source of contamination, the application of fertilizers would be the other possible source of contamination. The transformation of nitrogen compounds could affect the isotopic behavior of &#948;18O, although it is not ruled out that it could be due to evaporation processes and infiltration of shallow water. This information should be considered since the presence of nitrates in the environment represents a risk to the health of the population that is supplied by the same aquifer system where these activities take place.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Nitratos]]></kwd>
<kwd lng="es"><![CDATA[contaminación del agua subterránea]]></kwd>
<kwd lng="es"><![CDATA[fertilizantes]]></kwd>
<kwd lng="es"><![CDATA[agricultura]]></kwd>
<kwd lng="es"><![CDATA[isotopía]]></kwd>
<kwd lng="en"><![CDATA[Nitrates]]></kwd>
<kwd lng="en"><![CDATA[groundwater contamination]]></kwd>
<kwd lng="en"><![CDATA[fertilizer]]></kwd>
<kwd lng="en"><![CDATA[agriculture]]></kwd>
<kwd lng="en"><![CDATA[isotopic signature]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Amberger]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Schmidt]]></surname>
<given-names><![CDATA[H.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Natürlische Isotopengehalte von nitrat als indikatoren für dessen herkunft]]></article-title>
<source><![CDATA[Geochimica et Cosmochimica Acta]]></source>
<year>1987</year>
<volume>51</volume>
<page-range>2699-705</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<collab>American Public Health Association</collab>
<collab>American Water Works Association</collab>
<collab>Water Environment Federation</collab>
<source><![CDATA[Standard methods for the Examination of Water and Wastewater]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Washington, DC, USA ]]></publisher-loc>
<publisher-name><![CDATA[American Public Health Association, America]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brenes]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Cadena]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruíz-Guerrero]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Monitoreo de la concentración de nitratos en el acuífero del Valle de Puebla]]></article-title>
<source><![CDATA[Rev. Int. Contam. Ambie]]></source>
<year>2011</year>
<volume>27</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>313-21</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brito-Castillo]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Méndez Rodríguez]]></surname>
<given-names><![CDATA[L. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Chávez López]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Acosta Vargas]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Groundwater differentiation of the aquifer in the Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico]]></article-title>
<source><![CDATA[Geofís. Int.]]></source>
<year>2010</year>
<volume>49</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>167-79</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butaciu]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Senila]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sarbu]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ponta]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Tanaselia]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Cadar]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Roman]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Radu]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Sima]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Frentiu]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chemical modeling of groundwater in the Banat Plain, southwestern Romania, with elevated As content and co-occurring species by combining diagrams and unsupervised multivariate statistical approaches]]></article-title>
<source><![CDATA[Chemosphere]]></source>
<year>2017</year>
<volume>172</volume>
<page-range>127-37</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Burns]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kendall]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of d15N and d18O to differentiate NO3- sources in runoff at two watersheds in the Catskill Mountains of New York]]></article-title>
<source><![CDATA[Water Resour. Res.]]></source>
<year>2002</year>
<volume>38</volume>
<numero>9</numero>
<issue>9</issue>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[C. C. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Kendall]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[S. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Battaglin]]></surname>
<given-names><![CDATA[W. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Campbell]]></surname>
<given-names><![CDATA[D. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nitrate stable isotope: Tools for determining nitrate sources among different land uses in the Mississippi River Basin]]></source>
<year>2002</year>
<volume>59</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>1874-85</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Jia]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrate sources and watershed denitrification inferred from nitrate dual isotopes in the Beijiang River, south China]]></article-title>
<source><![CDATA[Biogeochemistry]]></source>
<year>2009</year>
<volume>94</volume>
<page-range>163-74</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[I. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Fritz]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environmental Isotopes in Hydrogeology]]></source>
<year>1997</year>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Groundwater Geochemistry and Isotopes]]></source>
<year>2015</year>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<collab>Comisión Estatal del Agua de Guanajuato (CEAG)</collab>
<source><![CDATA[Compendio del Agua Subterránea en Guanajuato. Dirección General de Planeación Dirección de Estudios y Monitoreo. 426 pp. Comisión Nacional del Agua CONAGUA, 2015. Actualización de la disponibilidad media anual de agua en el acuífero Valle de Celaya (1115), Estado de Guanajuato]]></source>
<year>2018</year>
<page-range>1-15</page-range><publisher-name><![CDATA[Diario Oficial de la Federación]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrera-Hernández]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Carreón-Freyre]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Cerca-Martínez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Levresse]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Groundwater flow in a transboundary fault-dominated aquifer and the importance of regional modeling, the case of the city of Querétaro, Mexico]]></article-title>
<source><![CDATA[Hydrogeol. J.]]></source>
<year>2016</year>
<volume>24</volume>
<page-range>373-93</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Craig]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Isotopic variations in meteoric waters]]></article-title>
<source><![CDATA[Science]]></source>
<year>1961</year>
<volume>133</volume>
<numero>3465</numero>
<issue>3465</issue>
<page-range>1702-3</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="">
<collab>CONAGUA</collab>
<source><![CDATA[Estadísticas del agua en México. México, D.F.]]></source>
<year>2016</year>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cotler]]></surname>
<given-names><![CDATA[H. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Anda Mazari]]></surname>
<given-names><![CDATA[J. De]]></given-names>
</name>
</person-group>
<source><![CDATA[Atlas de la cuenca Lerma-Chapala, construyendo una visión conjunta]]></source>
<year>2006</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional de Ecología, UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Coplen]]></surname>
<given-names><![CDATA[B.T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Normalization of oxygen and hydrogen isotope data]]></article-title>
<source><![CDATA[Chemical Geology isotope Geoscience section]]></source>
<year>1988</year>
<volume>72</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>293-7</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[D &#8217; Amore]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Scandiffio]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Panichi]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Some observations on the chemical classification of ground waters]]></article-title>
<source><![CDATA[Geothermics]]></source>
<year>1983</year>
<volume>12</volume>
<numero>1 - 14</numero>
<issue>1 - 14</issue>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Epstein]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Mayeda]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Variation of O18 content of waters from natural sources]]></article-title>
<source><![CDATA[Geochimica et cosmochimica acta]]></source>
<year>1953</year>
<volume>4</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>213-24</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eppich]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Singleton]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Roberts]]></surname>
<given-names><![CDATA[S. L]]></given-names>
</name>
<name>
<surname><![CDATA[Wimpenny]]></surname>
<given-names><![CDATA[J. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Derubeis]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Moran]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Esser]]></surname>
<given-names><![CDATA[B. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Yin]]></surname>
<given-names><![CDATA[Q.]]></given-names>
</name>
</person-group>
<source><![CDATA[Source determination of anthropogenic NO3 in groundwater by analysis of 15N, 18O, and 11B: A case study from San Diego County, California. Groundwater Resources Association of California, Fresno, CA. LLNL-ABS-551872. LLNL-PRES-559675]]></source>
<year>2012</year>
<page-range>1-12</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Foster]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Garduño]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Kemper]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Los "COTAS": Avances en la Gestión Participativa del Agua Subterránea en Guanajuato. Gestión Sustentable del Agua Subterránea Lecciones de la Práctica. Colección de Casos Esquemáticos Caso 10]]></source>
<year>2004</year>
<page-range>1-16</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[N. H.]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[B. J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[S. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Villers]]></surname>
<given-names><![CDATA[R. M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[D. R. R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Delimitación y caracterización de las tierras con uso inadecuado para la agricultura en el distrito de desarrollo rural 004, Celaya, Guanajuato]]></article-title>
<source><![CDATA[Terra Latinoamericana]]></source>
<year>2000</year>
<volume>18</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>11-25</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[R. J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gámez]]></surname>
<given-names><![CDATA[V. F. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tecnología de producción de semilla de cebada maltera en surcos. Campo Experimental Bajío-INIFAP-Impulsora Agrícola SA Fundación Guanajuato Produce A. C.]]></source>
<year>2002</year>
<page-range>2</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[R. J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gámez]]></surname>
<given-names><![CDATA[V. F. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Arreola]]></surname>
<given-names><![CDATA[T. J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Zamora]]></surname>
<given-names><![CDATA[D. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Producción de semilla de cebada maltera en diferentes sistemas de siembra. Campo Experimental Bajío CIRCE-INIFAP]]></source>
<year>2003</year>
<page-range>23</page-range><publisher-name><![CDATA[Celaya, Guanajuato, México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Goldbach]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Renkasem]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Wimmer]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[P.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Thellier]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Bell]]></surname>
<given-names><![CDATA[R.W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Boron in Plant and Animal Nutrition]]></source>
<year>2002</year>
<page-range>1-401</page-range><publisher-loc><![CDATA[US ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[R. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Silos]]></surname>
<given-names><![CDATA[A. J. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Economía de la producción agrícola en el Bajío. El sistema de pequeña propiedad en la zona de Celaya]]></source>
<year>1968</year>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hall]]></surname>
<given-names><![CDATA[D.W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of Nutrient Management on Nitrate levels in groundwater near Ephrata, Pennsylvania]]></article-title>
<source><![CDATA[Groundwater]]></source>
<year>1992</year>
<volume>30</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>720-30</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hoogesteger]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wester]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Regulating groundwater use: The challenges of policy implementation in Guanajuato, central Mexico]]></article-title>
<source><![CDATA[Enviromental Science &amp; Policy]]></source>
<year>2017</year>
<volume>77</volume>
<page-range>107-13</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="">
<collab>INEGI</collab>
<source><![CDATA[Prontuario de informacion geográfica municipal de los Estados Unidos Mexicanos, Villagrán, Guanajuato]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="">
<collab>INEGI</collab>
<source><![CDATA[Estructura económica de Guanajuato en síntesis]]></source>
<year>2016</year>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="">
<collab>Instituto de Ecología del Estado de Guanajuato (IEEG)</collab>
<source><![CDATA[Informe Ambiental del Estado de Guanajuato]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kaçaroglu]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Günay]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Groundwater nitrate pollution in an alluvian aquifer, Eskisehir urban area in its vicinity, Turkey]]></article-title>
<source><![CDATA[Environ. Geol.]]></source>
<year>1997</year>
<volume>31</volume>
<page-range>178-84</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kelling]]></surname>
<given-names><![CDATA[K. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil and applied boron (A2522)]]></source>
<year>1999</year>
<publisher-name><![CDATA[University of Wisconsin System Board of Reagents and University of Wisconsin Extension]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kendall]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[McDonnell]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[1998, Isotope tracers in catchment hydrology]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kendall]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Elliott]]></surname>
<given-names><![CDATA[E.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Wankel]]></surname>
<given-names><![CDATA[S.D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tracing anthropogenic inputs of nitrogen to ecosystems]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Michener]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Lajtha]]></surname>
<given-names><![CDATA[Kate]]></given-names>
</name>
</person-group>
<source><![CDATA[Stable Isotopes in Ecology and Environmental Science]]></source>
<year>2007</year>
<page-range>375-449</page-range><publisher-name><![CDATA[Wiley Online Library]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Koba]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Tokuchi]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Wada]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Nakajima]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Iwatsubo]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Intermittent denitrification: the application of a 15N natural abundance method to a forested ecosystem]]></article-title>
<source><![CDATA[Geochim. Et Cosmochim Acta]]></source>
<year>1997</year>
<volume>61</volume>
<page-range>5043-50</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kolpin]]></surname>
<given-names><![CDATA[D.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Burkart]]></surname>
<given-names><![CDATA[M.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Thurman]]></surname>
<given-names><![CDATA[E.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Herbicides and nitrates in near -surface aquifers in the Midcontinental United States]]></article-title>
<source><![CDATA[United States Geological Survey Water- Supply Paper]]></source>
<year>1994</year>
<volume>2413</volume>
<numero>1-34</numero>
<issue>1-34</issue>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lang]]></surname>
<given-names><![CDATA[Y. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[C.-Q.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhao]]></surname>
<given-names><![CDATA[Z. Q.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[S. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Han]]></surname>
<given-names><![CDATA[G. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Geochemistry of Surface and groundwater in Guiyang city, China: Water rock interaction and pollution in a karst hydrological system]]></article-title>
<source><![CDATA[Appl. Geochem.]]></source>
<year>2006</year>
<volume>21</volume>
<page-range>887-903</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[C. Q.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[S. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Lang]]></surname>
<given-names><![CDATA[Y. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Xiao]]></surname>
<given-names><![CDATA[H. Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Using &#948;15N- and &#948;18O-Values to identify nitrate sources in Karst groundwater, Guiyang, Southwest China]]></article-title>
<source><![CDATA[Environ. Sci. Technol.]]></source>
<year>2006</year>
<volume>40</volume>
<page-range>6928-33</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[J. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Fu]]></surname>
<given-names><![CDATA[Y. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Pike]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Bao]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Tian]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[C. Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[H. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Schroeder]]></surname>
<given-names><![CDATA[J. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Gassmann]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Gong]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Arabidopsis nitrate transporter NRT1.8 functions in nitrate removal from the xylem sap and mediates cadmium tolerance]]></article-title>
<source><![CDATA[Plant Cell]]></source>
<year>2010</year>
<volume>22</volume>
<page-range>1633-46</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Kronzucker]]></surname>
<given-names><![CDATA[H. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Balu&#353;ka]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Shi]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ammonium stress in Arabidopsis: signaling, genetic loci, and physiological targets]]></article-title>
<source><![CDATA[Trends Plant Sci.]]></source>
<year>2014</year>
<volume>19</volume>
<page-range>107-14</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lohn]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Guimaraes]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Bucich]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación Hidroquímicay de la Contaminación Químico-Biológica de la Cuenca El Carrizal - Zona Norte - Provincia de Mendoza República Argentina. Aguas Subterráneas]]></source>
<year>2000</year>
<page-range>1-23</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[López-Alvis]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Carrera-Hernández]]></surname>
<given-names><![CDATA[J.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Levresse]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Nieto-Samaniego]]></surname>
<given-names><![CDATA[A.F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessment of groundwater depletion caused by excessive extraction through groundwater flow modeling: the Celaya aquifer in central Mexico]]></article-title>
<source><![CDATA[Environmental Earth Sciences]]></source>
<year>2019</year>
<volume>78</volume>
<numero>482</numero>
<issue>482</issue>
</nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lord]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Anthony]]></surname>
<given-names><![CDATA[S. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Agricultural nitrogen balance and water quality in the UK]]></article-title>
<source><![CDATA[Soil Use and Management]]></source>
<year>2002</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>363-9</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mazabel]]></surname>
<given-names><![CDATA[D. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Caldera]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Self-Sustaining, Irrigated Agriculture and Sustainability. A Study in Southern Guanajuato, Mexico]]></article-title>
<source><![CDATA[International Journal of Research in Sociology and Anthropology (IJRSA)]]></source>
<year>2018</year>
<volume>4</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>24-35</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mengis]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Walther]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernasconi]]></surname>
<given-names><![CDATA[S.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Wehrli]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Limitations of using d18O for the source identification of nitrate in agricultural soils]]></article-title>
<source><![CDATA[Environ. Sci. Technol.]]></source>
<year>2001</year>
<volume>35</volume>
<page-range>1840-4</page-range></nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montiel-Palma]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta-Hernández]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Rodríguez]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Domínguez-Mariani]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Identification of nitrate pollution zones in groundwater south of the Mexican Basin]]></article-title>
<source><![CDATA[Rev. Int. Contam. Ambient.]]></source>
<year>2014</year>
<volume>30</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>149-65</page-range></nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Arredondo]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Villanueva-Estrada]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The origin of groundwater arsenic and fluorine in a volcanic sedimentary basin in central Mexico: a hydrochemistry hypothesis]]></article-title>
<source><![CDATA[Hydrogeological Journal]]></source>
<year>2016</year>
<volume>24</volume>
<page-range>1-16</page-range></nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Arredondo]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Villanueva-Estrada]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A low-temperature geothermal system in central Mexico: hydrogeochemistry and potential heat source]]></article-title>
<source><![CDATA[Geochemical Journal]]></source>
<year>2016</year>
<volume>50</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>211-25</page-range></nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Arredondo]]></surname>
<given-names><![CDATA[J. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Esteller-Alberich]]></surname>
<given-names><![CDATA[M. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta-Hernández]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Florentino]]></surname>
<given-names><![CDATA[T. A. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterizing the hydrogeochemistry of two low-temperature thermal systems in Central Mexico]]></article-title>
<source><![CDATA[Journal of Geochemical Exploration]]></source>
<year>2018</year>
<volume>185</volume>
<page-range>93-104</page-range></nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales Arredondo]]></surname>
<given-names><![CDATA[J.I.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta Hernández]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez Castillo]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimación de la exposición a elevados contenidos de fluoruro en agua potable en distintas comunidades de Guanajuato México]]></article-title>
<source><![CDATA[TECNOLOGIA Y CIENCIAS DEL AGUA]]></source>
<year>2018</year>
<volume>IX</volume>
<numero>3</numero>
<issue>3</issue>
</nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Arredondo]]></surname>
<given-names><![CDATA[J.I.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta-Hernández]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Mendiola]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Villanueva-Estrada]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Morton-Bermea]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydrogeochemical behavior of uranium and thorium in rock and groundwater samples from southeastern of El Bajío Guanajuatese, Guanajuato, Mexico]]></article-title>
<source><![CDATA[Environmental Earth Sciences]]></source>
<year>2018</year>
<volume>77</volume>
<numero>567</numero>
<issue>567</issue>
</nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Vera]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ceniceros]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrato en el agua subterránea del Valle de Huamantla, Tlaxcala, México]]></article-title>
<source><![CDATA[Rev. Int. Contam. Ambient.]]></source>
<year>2004</year>
<volume>20</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>91-7</page-range></nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="">
<collab>NOM-127-SSA1-1994</collab>
<source><![CDATA[Norma Oficial Mexicana "Salud ambiental, aguapara uso y consumo humano-límites permisibles de calidad y tratamientos a que debe someterse el agua para su potabilización"(Modificada 2000)]]></source>
<year></year>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="">
<collab>NOM-230-SSA1-2002</collab>
<source><![CDATA[Norma Oficial Mexicana. "Salud ambiental. Agua para uso y consumo humano, requisitos sanitarios que se deben cumplir en los sistemas de abastecimiento públicos y privados durante el manejo agua. Procedimientos sanitarios para el muestreo"]]></source>
<year></year>
<page-range>1-19</page-range></nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Óenema]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Boers]]></surname>
<given-names><![CDATA[P. C. M.]]></given-names>
</name>
<name>
<surname><![CDATA[van Eerdt]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fraters]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[van der Meer]]></surname>
<given-names><![CDATA[H. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Roest]]></surname>
<given-names><![CDATA[C. W. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Schröder]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Willems]]></surname>
<given-names><![CDATA[W. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Leaching of nitrate from agriculture to groundwater: the effect of policies and measures in the Netherlands]]></article-title>
<source><![CDATA[Environ. Pollut.]]></source>
<year>1998</year>
<page-range>102-S1</page-range></nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortega-Gutiérrez]]></surname>
<given-names><![CDATA[J. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Caracterización hidrogeoquímica del agua subterránea en el municipio de Villagrán, Guanajuato: Procesos relacionados con la presencia de arsénico y fluoruro en el acuífero]]></source>
<year>2019</year>
<page-range>1-109</page-range><publisher-name><![CDATA[Instituto Politécnico Nacional]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Osman]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Boschetti]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Djibril]]></surname>
<given-names><![CDATA[Y. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Baudron]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Dirir]]></surname>
<given-names><![CDATA[A. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Assowe]]></surname>
<given-names><![CDATA[O. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Mahdi]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Idriss]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ahmed]]></surname>
<given-names><![CDATA[M. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Moussa]]></surname>
<given-names><![CDATA[N. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Mohamed]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Geochemical study of the Sakalol-Harralol geotermal field (Republic of Djibouti): Evidences of a low enthalpy aquifer between Manda-Inakir and Asal rift settings]]></article-title>
<source><![CDATA[Journal of Volcanology and Geothermal Research]]></source>
<year>2016</year>
<volume>331</volume>
<page-range>26-52</page-range></nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paces]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Pacesova]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Weathering of rocks in soil budgets of trace metals]]></article-title>
<source><![CDATA[Water - Rock Interaction WRI-10]]></source>
<year>2001</year>
<volume>10</volume>
<numero>15</numero>
<issue>15</issue>
<publisher-loc><![CDATA[Villasimius, Italy ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paces]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Smejkal]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Magmatic and fossil components of mineral waters in the Eager-river continental rift]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Wanty]]></surname>
<given-names><![CDATA[R. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Seal II]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water - Rock Interaction]]></source>
<year>2004</year>
<page-range>167-72</page-range></nlm-citation>
</ref>
<ref id="B60">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Panno]]></surname>
<given-names><![CDATA[S. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Kelly]]></surname>
<given-names><![CDATA[W. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hackley]]></surname>
<given-names><![CDATA[K. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Hwang]]></surname>
<given-names><![CDATA[H. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Martinsek]]></surname>
<given-names><![CDATA[A. T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sources and fate of nitrate in the Illinois river basin, Illinois]]></article-title>
<source><![CDATA[Journ. Hydrol.]]></source>
<year>2008</year>
<volume>359</volume>
<page-range>174-88</page-range></nlm-citation>
</ref>
<ref id="B61">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rayner-Canham]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Química Inorgánica Descriptiva]]></source>
<year>2000</year>
<edition>2nd</edition>
<page-range>1-595</page-range><publisher-name><![CDATA[Prentice Hall editorial]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B62">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Rosales]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Berlín]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Mejía]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estructuración de mapas temáticos de índices de vulnerabilidad acuífera de la mancha urbana de Salamanca, Gto. Municipio de Salamanca]]></source>
<year>2001</year>
<page-range>1-99</page-range><publisher-name><![CDATA[CEAG]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B63">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Herna&#769;ndez]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluacio&#769;n de Vulnerabilidad Acu&#305;&#769;fera del valle de Irapuato, Gto.]]></source>
<year>2006</year>
<publisher-name><![CDATA[JAPAMI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B64">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Velázquez]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Consecuencias sociales de un desastre inducido, subsidencia]]></article-title>
<source><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></source>
<year>2006</year>
<volume>63</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>265-9</page-range></nlm-citation>
</ref>
<ref id="B65">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Schroeder]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Structural control on the subsidence faults alignment in Irapuato Mexico]]></article-title>
<source><![CDATA[AQUA mundi]]></source>
<year>2010</year>
<volume>1007</volume>
<page-range>045-9</page-range></nlm-citation>
</ref>
<ref id="B66">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lira]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodriguez]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Subsidence risk due to groundwater extraction in urban areas using fractal analysis of satellite images]]></article-title>
<source><![CDATA[Geofis. Intl.]]></source>
<year>2012</year>
<volume>51</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>157-67</page-range></nlm-citation>
</ref>
<ref id="B67">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Morales-Arredondo]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Geological Differentiation of Groundwater Threshold Concentrations of Arsenic, Vanadium and Fluorine in El Bajío Guanajuatense, Mexico]]></article-title>
<source><![CDATA[Geofis. Intl.]]></source>
<year>2016</year>
<volume>55</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>5-15</page-range></nlm-citation>
</ref>
<ref id="B68">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Armienta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Villanueva]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Segovia]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Geothermal systemsof low temperature in Mexican Highlands:Alternative uses and associated risks]]></article-title>
<source><![CDATA[Procedia Environmental Sciences]]></source>
<year>2015</year>
<page-range>214-9</page-range></nlm-citation>
</ref>
<ref id="B69">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Palacios]]></surname>
<given-names><![CDATA[O. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Escobar]]></surname>
<given-names><![CDATA[B. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimación de la sobreexplotación producida en el acuífero Valle de Celaya (México)]]></article-title>
<source><![CDATA[Tecnología y Ciencias del Agua]]></source>
<year>2017</year>
<volume>VIII</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>127-38</page-range></nlm-citation>
</ref>
<ref id="B70">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rudnick]]></surname>
<given-names><![CDATA[R.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Gao]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Composition of the continental crust]]></article-title>
<source><![CDATA[Treatise on Geochemistry]]></source>
<year>2014</year>
<volume>4</volume>
<edition>second</edition>
<page-range>1-51</page-range><publisher-loc><![CDATA[Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Elsevier]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B71">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schroeder]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Scholefield]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Cabral]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Hofman]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of nutrient losses from agriculture on ground and surface water quality: the position of science in developing indicators for regulation]]></article-title>
<source><![CDATA[Environmental Science &amp; Policy]]></source>
<year>2004</year>
<volume>7</volume>
<page-range>15-23</page-range></nlm-citation>
</ref>
<ref id="B72">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sokol]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Kokh]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Kozmenko]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Novikova]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Khvorov]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Nigmatulina]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Belogub]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Kirillov]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mineralogy and geochemistry of mud volcanic ejecta: a new look at old issues (a case study from the Bulganak field, Northern Black Sea)]]></article-title>
<source><![CDATA[Minerals]]></source>
<year>2018</year>
<volume>8</volume>
<page-range>344</page-range></nlm-citation>
</ref>
<ref id="B73">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sokol]]></surname>
<given-names><![CDATA[E. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Kokh]]></surname>
<given-names><![CDATA[S. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Kozmenko]]></surname>
<given-names><![CDATA[O. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lavrushin]]></surname>
<given-names><![CDATA[V. Yu.]]></given-names>
</name>
<name>
<surname><![CDATA[Kikvadze]]></surname>
<given-names><![CDATA[O. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Mud-volcanoes as important pathway for trace elements input to the environment: case study from the Kerch-Taman province, Northern Black Sea]]></source>
<year>2018</year>
<conf-name><![CDATA[ 18thInternational Multidisciplinary Scientific GeoConference proceeding]]></conf-name>
<conf-loc> </conf-loc>
<page-range>307-22</page-range></nlm-citation>
</ref>
<ref id="B74">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tóth]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Gravitational systems of groundwater flow: theory, evaluation, utilization]]></source>
<year>2009</year>
<page-range>297</page-range><publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Cambridge University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B75">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wassenaar]]></surname>
<given-names><![CDATA[L. I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of the origin and fate of nitrate in the Abbotsford aquifer using the isotopes of 15N and 18O in NO3]]></article-title>
<source><![CDATA[Applied Geochemistry]]></source>
<year>1995</year>
<volume>10</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>391-405</page-range></nlm-citation>
</ref>
<ref id="B76">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wick]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Heumesser]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Schmid]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Groundwater nitrate contamination: Factors and Indicators]]></article-title>
<source><![CDATA[J. Environ. Manage]]></source>
<year>2012</year>
<volume>111</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>178-86</page-range></nlm-citation>
</ref>
<ref id="B77">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Widory]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Kloppmann]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Chery]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Bonnin]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Rochdi]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Guinamant]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrate in groundwater: an isotopic multi-tracer approach]]></article-title>
<source><![CDATA[Journal of contaminant hydrology]]></source>
<year>2004</year>
<volume>72</volume>
<numero>1-4</numero>
<issue>1-4</issue>
<page-range>165-88</page-range></nlm-citation>
</ref>
<ref id="B78">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[L. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Hervig]]></surname>
<given-names><![CDATA[R. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Holloway]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hutcheon]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Boron isotope geochemistry during diagenesis. Part I. Experimental determination of fractionation during illitization of smectite]]></article-title>
<source><![CDATA[Geochim. Cosmochim. Acta]]></source>
<year>2001</year>
<volume>65</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1769-82</page-range></nlm-citation>
</ref>
<ref id="B79">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yao]]></surname>
<given-names><![CDATA[L. X.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[G. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Tu]]></surname>
<given-names><![CDATA[S. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Gavin]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[Z. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Salinity of animal manure and potential risk of secondary soil salinization through successive manure application]]></article-title>
<source><![CDATA[Sci. Total Environ.]]></source>
<year>2007</year>
<volume>383</volume>
<page-range>106-14</page-range></nlm-citation>
</ref>
<ref id="B80">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yue]]></surname>
<given-names><![CDATA[F. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[S. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Zhong]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of factors driving seasonal nitrate variations in Surface and underground systems of a karst catchment]]></article-title>
<source><![CDATA[Vadose Zone Journal]]></source>
<year>2018</year>
<page-range>1-10</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
