2215-4175
2215-4175
S2215-41752017000100287
10.15517/aeca.v43i0.31559
USA
El Salvador
00
12
2017
00
12
2017
43
287
312
[
1996
]
[
2001
]
[
2005
]
[
2013
]
[
2016
]
[
2007
]
[
1986
]
[
2016
]
[
2014
]
[
1998
37
37
7-225
]
[
2007
11-94
]
[
2000
35
1
1
138-49
]
[
2015
]
[
1982
]
[
1985
1
10
10
232-40
]
[
1990
4
31
31
213-23
]
[
2002
]
[
2009
]
[
2003
]
[
1993
]
[
2004
]
[
2010
]
[
2003
]
[
2015
41
29-65
]
[
2003
]
[
2010
]
[
2007
]
[
1965
1
1
89-108
]
[
1932
181
181
8-11
]
[
1932
]
[
1977
]
[
1995
232-61
]
[
1997
]
[
1989
]
[
1946
]
[
2009
]
[
1989
15
1
1
49-63
]
[
2015
20
]
[
2014
]
[
2016
]
[
2010
]
[
2011
]