1390-0129 1390-0129 S1390-01292019000500015 10.33333/rp.vol44n2.02 Ecuador 00 01 2019 00 01 2019 44 2 15 24

1933 First Edition 1926 5 539-54 1928 66(382) 1065-78 1993 2009 1995 2002