0185-2620 0185-2620 S0185-26202007000200005 Mexico 00 12 2007 00 12 2007 34 5 27

2002 1996 1995 1990 63 446-67 1987 1992 1998 1990 1993 1991 2004 1989 1992 48 145-51 1992 69-72 1992 1983 2006 2002 1997 1990 1988 2004 2003 1993 71-90 2002 2005 76-82 1975 1976 13 2 2 10-27 1999 1997 1976 2004 1994 1982 1997 1995 1989 2 1976 1980 2004 1997 1996 1991 1981 1996 48 2 2 20-8 2006 1989 1993 1989 1990 67 3 3 586-91 1997 5 4 4 38-43 1985 1984 1984 1991 1985 2004 1999 52 4 4 485-97 1994 1993 1989 1981 1991 1999 2 24-34 1999 1990 1995 1998 1998 1995 1995 1998 14 1 1 61-102 2003 1980 4 79 1997 73 3 3 531-46