By Kruse, Herman C..
Buenos Aires Editorial ECRO 1970 .
94 p.

By Kruse, Herman C..
Buenos Aires Editorial ECRO 1974 .
166 p.

By Becerra de Ledesma, Rosa María..
Buenos Aires Editorial ECRO 1972 .
142 p.

By Ander-Egg, Ezequiel.
Buenos Aires Editorial Ecro 1975 .
379 p.

By Gallardo Clark, María Angélica.
[Buenos Aires] Editorial ECRO 1973 .
126 p. 19 cm..

By Ander-Egg, Ezequiel.
Buenos Aires Editorial Ecro 1975 .
158 p.

[Buenos Aires] Editorial ECRO 1973 .
220 p. 21 cm..

By Kruse, Herman C..
Buenos Aires Editorial ECRO 1962 .
167 p.

By Gallardo Clark, María Angélica.
Buenos Aires Editorial ECRO 1974 .
126 p.

By Dupont Olveira, Reneé..
[Buenos Aires Editorial ECRO 1969 .
156 p. 22 cm..