1
Published in 1988
Repository
2
Published in 1995
Repository
3
Published in 1993
Repository
4
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
5
Published in 1976
Repository