0257-4314 0257-4314 S0257-43142019000100001 Ecuador EE.UU 00 04 2019 00 04 2019 38 1

1996 2000 17 3 3 266-9 2003 20 1 1 27-32 2009 1993 1967 1972 2016 1975 1975 1982 1971 1985 1968 1993 10 1 1 29-35 1996 2001 1967 1944 1978 1971