1
Published in 2018
Repository
2
Published in 2008
Repository
3
Published in 2002
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4
5
6
7
8
9
Published in 1988
Repository
10
11
12
13
by Barrera, Víctor Hugo; Cruz, Elena; Cárdenas de Mera, Flor María; Cobeña Ruiz, Gloria; Zambrano Lucero, Hector Miguel
Published in 2010
Repository
14
Published in 2010
Repository
15
16
17
by Navarrete Cedeño, José Bernardo; Cañarte Bermúdez, Ernesto; Chérrez, César; Velásquez, José; García, Jefferson; Reyes, Carlos
Published in 2016
Repository
18
19
Published in 1973
Repository
20
Published in 1989
Repository