0185-1918 0185-1918 S0185-19182007000100063 10.22201/fcpys.2448492xe.2007.199.42550 Mexico 00 04 2007 00 04 2007 49 199 63 78

1977 1993 1995 1985 1988 1989 1971 2001 1998 1994 1992 2001 1984 XXV 78 78 1991 1976 1999 1976 1991 1977 1957 1979 1994 1986 1999