0186-7210
0186-7210
S0186-72102008000300455
10.24201/edu.v23i3.1318
Mexico
00
12
2008
00
12
2008
23
3
455
479
[
1981
47
2
2
207-21
]
[
1981
]
[
1960
]
[
1950
45
251
251
311-34
]
[
1979
]
[
1961
]
[
1976
]
[
1986
]
[
Naciones Unidas
1953
17
17
]
[
Naciones Unidas
2005
]
[
1990
5
3 (15)
3 (15)
373-86
]
[
2006
]
[
2006
]
[
2008
]
[
1920
6
6
6
275-88
]
[
1983
]
[
1982
48
2
2
217-59
]
[
1835
]
[
1838
10
10
113-21
]
[
1845
1
1
1-45
]
[
1936
31
31
457-73
]