0253-5785 0253-5785 S0253-57852020000500038 Ecuador Ecuador 00 00 2020 00 00 2020 47 38 42

2004 2018 4390 1 1 1-63 2014 157 2020 2000 2006 45 2 2 7-112 2018 21 3 3 325-31 2010 50 1998 2017 Primera edición 32