1870-4115 1870-4115 S1870-41152006000200100 10.22201/cimsur.18704115e.2006.2.248 Mexico 00 12 2006 00 12 2006 1 2 100 121

1987 1999 97-105 2000 1999 19-27 1987 2001 1971 2003 1999 11-9 1966 1990 1968