11141
11142
11143
11144
11145
Published in 2014
Repository
11146
11147
11148
Published in 1983
Repository
11149
11150
by Guerrero Castillo, Hilton Ecuador; Plaza Avellán, Luis Fernando; Quijano Rivadeneira, Grisnel Carmelo; Subía García, Cristian Roberto; Calderón Peña, Esteban Darío
Published in 2016
Repository
11151
11152
Published in 2002
Repository
11153
by Villavicencio Sotomayor, María Fernanda; Benítez B., Jacqueline; Rivadeneira Ruales, Jorge Esteban; Cuesta Subía, Hugo Xavier
Published in 2008
Repository
11154
11155
11156
Published in 2002
Repository
11157
11158
11159
11160