1870-199X 1870-199X S1870-199X2009000100024 10.22201/fo.1870199xp.2009.13.1.15615 Mexico Mexico Mexico Mexico 00 00 2009 00 00 2009 13 1 24 30

1 1991 87 1 1 174-84 2 2002 112 112 351-4 3 24 1 1 4 2003 30-7 5 II 6 1978 XVI 1 1 7 2000 84 335-40 8 1980 43 5 5 552-60 9 2004 92 3 3 294-8 10 2001 85 5 5 438-41 11 2001 6 20-4 12 1999 13 1987 79 721-30 14 1989 3 39-70 15 2005 13 4 4 255-62 16 17 1980 43 1 1 82-5 18 Asin-LLorca F et al 2003 8 5 5 553-61 19 2000 687-90 20