1
book
Published in 1992
Repository Repositorio Universidad Politécnica Salesiana
2
book
Published in 2015
Repository Repositorio Universidad Técnica de Machala
3
book
Published in 2014
Repository Repositorio Universidad Andina Simón Bolivar
4
book
by Cárdenas Reyes, María Cristina; Carrasco Vintimilla, Manuel; Espinosa, Leonardo; Malo González, Claudio
Published in 2001
Repository Repositorio Universidad de Cuenca