2448-7678
2448-7678
S2448-76782007000200031
Mexico
USA
Mexico
00
12
2007
00
12
2007
36
100
31
39
[
1993
35-7
]
[
1982
35
2
2
268-72
]
[
1989
]
[
1993
]
[
1991
tercera
52
]
[
1988
11
6
6
116-81
]
[
1989
4
2
2
77-99
]
[
1991
]
[
1997
8
4
4
502-3
]
[
1989
]
[
1983
]
[
1987
2
3
3
1-10
]
[
1958
]
[
2001
261-3
]
[
2001
32
3
3
586
]
[
1990
]
[
2000
123-31
]
[
1997
]
[
1998
28
2
2
77
]
[
1991
20
34-48
]