1
book
Published in 1985
Repository Repositorio Universidad Politécnica Salesiana
2
article
Published in 2004
Repository Revista ICONOS
3
article
Published in 2004
Repository Repositorio Facultad Latinoamericana de Ciencias Sociales
4
article
Published in 1986
Repository Repositorio Facultad Latinoamericana de Ciencias Sociales