1405-3195 1405-3195 S1405-31952007000600663 Mexico Mexico 00 09 2007 00 09 2007 41 6 663 674

1998 2379-87 2003 12 2 2 213-26 1990 147 297-300 1995 2005 14 4 4 457-74 2002 Coimbra, Portugal 2-9 2005 11 617-26 1998 8 159-70 1998 13 15-23 2001 Estado de Veracruz 235-52 1992 6 123-40 1993 71 2737-40 1989 29 147-59 1999 65-84 1996 8 6803-24 1993 199 183-97 2005 42 1 1 109-29 1999 9 1 1 9-20 1993 1 16-21 1993 71 2741-4 1996 10 928-33 1994 78 186-93 1992 1999 20 93-116 1998 281 1840-2 1987 11 3 3 143-7 1996 2000 Dresden, Germany 137-42 SEMARNAT 2005 2003 22 2 2 249-60 1995 1996 10 9-18 1995 5 101-11 1999 9 4 4 235-46 2001 47 3 3 349-60