1665-8574 1665-8574 S1665-85742007000200059 Venezuela Venezuela 00 12 2007 00 12 2007 45 59 78

1964 36 1992 36 36 49-72 1987 153-68 1974 2-60 1994 1985 21 1998 1976 4-50 1995 2-50 1998 1990 1974 3-49 1991 1992 31-70