1405-0471 1405-0471 S1405-04712005000200035 10.21829/myb.2005.1121255 Mexico Mexico 00 00 2005 00 00 2005 11 2 35 48

1995 42 501-15 1996 6 665-91 1998 43 336-47 1997 41 43-79 1999 13 640-52 2000 1 12-6 1978 1979 6 65-70 1992 2003 381-8 1986 1987 68 434-43 1987 34 240-9 1991 57 81-116 1974 1974 355-76 2004 1967 1974 2002 1978 SAS Institute Inc. 1998 SECOPE 2003 1980 1995 83 1009-20 2002 1990 1988 75 175-87