121
122
123
126
127
Published in 1974
Repository
128
129
Published in 1994
Repository
130
131
by Pallo, Edwin; Taipe, Arturo; Panchi, Nancy; Montesdeoca, Fabián; Yumisaca, Fausto; Andrade-Piedra, Jorge
Published in 2011
Repository
132
133
134
Published in 1992
Repository
135
Published in 2018
Repository
136
Published in 2007
Repository
137
138
Published in 2013
Repository
139
bachelorThesis
Published in 2005
Repository Repositorio Universidad San Francisco de Quito
140
bachelorThesis
Published in 2014
Repository Repositorio Universidad San Francisco de Quito