1405-0471 1405-0471 S1405-04712005000100029 10.21829/myb.2005.1111260 Mexico 00 00 2005 00 00 2005 11 1 29 47

1987 1985 15 1455-65 1995 9 1 1 57-72 1983 81 232-4 1983 1996 17 1 1 3-7 1997 93 21-31 1997 98 125-34 1994 40 2 2 329-40 1999 29 621-9 1995 25 1455-65 1984 30 3 3 731-43 1963 3 1996 26 327-31 1998 Validivia, Chile 1996 5 2 2 214-29 SAS Institute Inc. 1987 1984 30 4 4 1066-70 1992 22 341-7 UCODEFO 1997 1995 41 1 1 7-42 1994 1982 1993 42 3 3 594-616 1999 118 183-96 1998 4 1 1 27-39