0187-0173 0187-0173 S0187-01732007000200227 Mexico 00 08 2007 00 08 2007 22 64 227 240 1999 156 156 1996 1984 1999 1997 1995 1987 1985 1981 1979 1977 1971 2003 1959 1998 San Agustín 1986