1
2
by Grijalva O., Jorge; Limongi, Ricardo; Arévalo Vizcaino, Venus; Vera, Roy; Quiroz, J.; Yumbo, A.; Jara, Fausto; Sigcha Morales, Franklin Anthony; Riofrío, José; Cerda, A.
Published in 2012
Repository
3
Published in 1985
Repository
4
by Grijalva O., Jorge; Ramos Veintimilla, Raúl; Arévalo Vizcaino, Venus; Barrera A., Paulo; Guerra M., Jaime
Published in 2013
Repository
5
6
Published in 1982
Repository
7
8