0187-0173 0187-0173 S0187-01732006000100273 Mexico 00 04 2006 00 04 2006 21 60 273 286 2002 2001 2001 1996 1994 1997 1995 1993 1998 1996 1995 1994 1999 1996 1979 1998 1994 2003 2000 5 5 107-26 1985 2001 1997 1989 1976 1975 1968 2003 1974 1988 1986 1986 1976 2002 50 50 103-21