2007-6835
2007-6835
S2007-68352018000300317
10.21041/ra.v8i3.321
Venezuela
Mexico
00
12
2018
00
12
2018
8
3
317
332
[
1997
122
1
1
27-34
]
[
1996
18
1
1
47-59
]
[
2014
9
8211-25
]
[
1933
]
[
1995
25
2
2
257-64
]
[
2016
6
3
3
272-83
]
[
1997
19
2
2
131-7
]
[
ISO 9223
2012
]
[
1999
51
2
2
97-112
]
[
1997
11
4
4
239-48
]
[
1990
178-87
]
[
1999
]
[
2003
15
4
4
344-53
]
[
2007
109
2
2
]
[
2013
69
11
11
1122-31
]
[
2007
49
7
7
2832-43
]
[
2004
34
1
1
165-74
]