2218-3620 2218-3620 S2218-36202021000200160 Ecuador 00 04 2021 00 04 2021 13 2 160 169

2008 187-207 2009 2009 1993 11a 1993 1954 2015 2016 2000 2012 2010 2018 2001 2015 2008 2020 2017 2017 1963 46-8 2002 2001 2018 2004