1665-3521 1665-3521 S1665-35212005000400018 Mexico México Mexico 00 00 2005 00 00 2005 18 4 18 20

[1] 169-71 [2] 2002 23 521 [3] 2005 125 729 [4] 1989 40 9606 [5] 1991 95 766 [6] 1990 121 231 [7] 1995 72 273 [8] 1993 56 235 [9] 1973 10 [10] 1970 2 [11] 1989 40 9607 [12] [13]