21
Published in 1999
Repository
22
Published in 1995
Repository
23
by Cárdenas, A.; Grijalva O., Jorge; Morillo, Eduardo; Ramos Veintimilla, Raúl; Meneses Montesdeoca, Luis Santiago
Published in 2013
Repository
24
25
26
Published in 1996
Repository
27
28
29
30
31
Published in 1993
Repository
32
33
by Grijalva O., Jorge; Ramos Veintimilla, Raúl; Arévalo Vizcaino, Venus; Barrera A., Paulo; Guerra M., Jaime
Published in 2013
Repository
34
Published in 2013
Repository
35