2550-6722 2550-6722 S2550-67222017000100095 Venezuela 00 08 2017 00 08 2017 2 95 109

2004 1993 1998 1996 1996 8-9 1990 2007 1976 2006 1999 1994 1994 2002 1994 1979 1980 2001 11 30 30 36-64 1999