0187-5779 0187-5779 S0187-57792013000100035 Mexico 00 03 2013 00 03 2013 31 1 35 46

APHA (American Public Health Association) 1992 18 ASTM (American Society for Testing and Materials) 2000 2000 2010 70 465-73 1991 2005 22 25-31 2002 2006 6 64-83 1993 34 64 2006 35 183-96 2008 77 137-49 2001 83 11-26 2004 33 37-44 2011 15 123-30 INEGI (Instituto Nacional de Estadística Geografía e Historia) 2004 INEGI (Instituto Nacional de Estadística, Geografía e Historia) 2007 1999 65 396-403 2001 2001 6 22-8 1997 26 2 2003 32 2379-86 2005 34 659-573 NRAES (Nature Resource, Agriculture and Engineering Service) 1999 2009 21 105-10 1995 2001 35 377-84 2002 65 123-9 1998 2004