21
by Amores Puyutaxi, Freddy Marcelo; Agama Parreño, Juan Emilio; Mite Vivar, Francisco Arturo; Jiménez Barragán, Juan Carlos; Loor Solórzano, Rey Gastón; Quiroz Vera, James Gonzalo
Published in 2009
Repository
22
by Jiménez Barragán, Juan Carlos; Amores Puyutaxi, Freddy Marcelo; Nicklin, Claire; Rodríguez, Daysi; Zambrano Flores, Fanny Gissela; Bolaños, Milton; Reynel, Víctor; Dueñas, Alfredo; Cedeño, Paúl
Published in 2011
Repository
23
by Duicela Guambi, Luis; Guerrero Castillo, Hilton Ecuador; Amores Puyutaxi, Freddy Marcelo; Corral, Rubén
Published in 2004
Repository
24
by Calderón Peña, Esteban Darío; Loor Solórzano, Rey Gastón; Amores Puyutaxi, Freddy Marcelo; Motamayor, J. C.; Peña Monserrate, Geover Rolando
Published in 2006
Repository
25
Published in 1976
Repository
26
27
28
Published in 1993
Repository