61
Published in 1982
Repository
62
Published in 1998
Repository
63
64
Published in 1991
Repository
65
Published in 1989
Repository
66
67
Published in 1992
Repository
68
Published in 1993
Repository
69
by Nieto C., Carlos; Tapia B., César; Paredes, Nelly; Nieto E., Mercedes; Añazco R., Mario; Hidrobo U., Gabriela; Flor A., Efrén
Published in 2017
Repository
70
Published in 1980
Repository