0187-5779 0187-5779 S0187-57792012000100069 Mexico Mexico 00 03 2012 00 03 2012 30 1 69 79

1991 27 1827-36 1998 62 1228-33 1996 256 256 7-11 2000 16 501-4 1999 47 301-25 1979 2006 95 281-93 2005 48 149-54 2005 69 748-56 2001 46 125-39 1975 39 755-63 1977 70-2062 70-2062 1980 1983 83-2514 83-2514 1990 14-22 1972 36 948-53 1977 7 79-88 1997 40 155-68 Food and Agriculture Organization, and United Nations Educational, Scientific and Cultural Organization 1987 1982 25 124-9 2004 59 253-66 2001 5 27-33 2000 64 1749-58 2006 85 13-26 1964 28 119-22 2005 21 595-603 1998 32 209-23 1976 40 963-5 2007 71 1909-18 1990 54 1117-23 1993 155 229-35 1994 7 93-103 2010 26 239-45 1984 27 729-32 2002 45 1011-9 2001 46 141-57 1997 2001 46 103-23 2006 44 503-14 2007 94 183-92 1994 158 267-72 2005 43 723-33 2000 39 1-37 1991 29 249-61 2002 2003 032315 032315 1978 2007 70 306-12 2003 67 630-6