1405-0471 1405-0471 S1405-04712007000100025 10.21829/myb.2007.1311233 Mexico Mexico Mexico 00 00 2007 00 00 2007 13 1 25 34

2002 36 6 6 725-36 2003 135 1983 3a 331 2002 113 2001 116 363-72 2001 72 1993 89 1993 66 2002 247 2004 1998 54 2001 86 2005 23 1 1 57-64 2003 47 1987 242 2003 30 2002 53 1979 5 1978 47 4 4 373-400 2003 90 2002 512 1988 55 NETL 2004 1982 32 2004 51 2000 289 5487 5487 2058-9 2001 127 2003 47