0187-5779 0187-5779 S0187-57792011000200153 Mexico 00 06 2011 00 06 2011 29 2 153 160

1983 13 17-42 1948 13 224-6 1964 283 1985 56 745-54 Food and Agriculture Organization of The United Nations 2008 2000 51 463-99 2002 2 1-15 1992 120 547-55 1977 103 115-34 1996 116 177-84 1983 245-8 1989 78 249-64 2003 21 481-91 2008 33 643-50 SAS Institute 2006 1984 634-49 1964 1989 2002 20 459-64