1
Published in 1976
Repository
2
3
by Zambrano Mendoza, Jhonny; Amores Puyutaxi, Freddy Marcelo; Eskes, B.; Vasco Medina, Segundo Alfonso; Peña Monserrate, Geover Rolando
Published in 2006
Repository
4
by Calderón Peña, Esteban Darío; Loor Solórzano, Rey Gastón; Amores Puyutaxi, Freddy Marcelo; Motamayor, J. C.; Peña Monserrate, Geover Rolando
Published in 2006
Repository
5