1405-6666 1405-6666 S1405-66662006000200431 00 06 2006 00 06 2006 11 29 431 457

1998 1996 2000 2000 1997 Conapo 2000 2000 1998 1992 1996 1997 1994 1997 9 18 18 9-28 1998 2000 1999 1986 2002 1992 2001 1996 1999 1999 1996 1996 2000 1997 2000 1996 1998