0185-2620 0185-2620 S0185-26202006000100031 México 00 06 2006 00 06 2006 31 31 56

1981 1993 1999 2000 2000 2004 2003 1985 2004 2003 1988 213-27 1986 1932 38 1 1 20-31 1988 1988 1988