0186-7210
0186-7210
S0186-72102007000100143
10.24201/edu.v22i1.1296
Mexico
Canada
00
04
2007
00
04
2007
22
1
143
178
[
1999
69-84
]
[
2003
29
86
86
37-49
]
[
2003
]
[
1993
]
[
1993
52-75
]
[
1999
345-58
]
[
1999
89
1
1
129-31
]
[
1996
86
3
3
437-40
]
[
2001
21-52
]
[
2001
53-90
]
[
1995
383-90
]
[
2005
31
92
92
29-46
]
[
1999
14
3
3
545-98
]
[
1996
]
[
1995
39
107
107
309-33
]
[
2005
]
[
2003
]
[
2002
53
53
51-8
]
[
1980
70
4
4
397-422
]
[
1995
146-52
]
[
1999
]
[
2002
14
25
25
64-108
]
[
1988
32
2
2
98-113
]
[
2002
]
[
1936
42
42
1-15
]
[
1983
7
7
307-24
]
[
1996
]
[
2000
60
4
4
20-33
]
[
2001
10
19
19
13-31
]
[
1995
]
[
1994
131-52
]
[
1995
258-66
]
[
1990
8
8
73-96
]
[
1938
44
44
1-24
]
[
1999
75
4
4
309-38
]
[
1995
190-5
]