1405-0218 1405-0218 S1405-02182001000100109 Mexico 00 04 2001 00 04 2001 14 109 133 1987 1989 1930 1932 1975 I Encyclopaedia Britannica 2000 Encyclopaedia Britannica 1975 I 1962 1 1996 1997 1998 1965 1975 40 42- y 78-92 1996 1993 1996