2007-2422

S2007-24222020000600368

10.24850/j-tyca-2020-06-09

Ecuador

Venezuela

00 12 2020

11 6 368 399

American Paint Horse Association, American Water Works Association, Water Environment Federation 2012 22

Asociación de Graduados de la EARTH-Ecuador 2018

2016 9 20 20

109-17

2004

2017

2008 15 4 4

491-8

2013 66

24-44

2016

2005 1 1 1

69-76

Global Health and Education Foundation, National Academy of Science 2007

2006 40 2 2

191-2

1981 73

2006

2004 4

72-82

2000

Porto Alegre, Brasil

2015

Ministerio del Ambiente de Ecuador 2009

2012

Norma Técnica Ecuatoriana, Instituto Nacional Ecuatoriano de Nomalización 2014

Norma Técnica Ecuatoriana, Instituto Nacional Ecuatoriano de Nomalización 2017

2015

2014

2011 1 1 1

27-33

1999 33 3 3

741-50

2017

2016 11 39 39

3733-40

2000 50 2 2

151-5

2012

2016 26 1 1

2010 156

11-24