- Author: Camilo Torres, Óscar Maldonado, Guitemie Oliviéri, Germán Zabala
- Language: Spanish
- Year: 1970
- Author: Camilo Torres, Linda Day, Robert Olsen
- Language: English
- Year: 1969
- Author: H. Bojorge, Hildegard Goss-Mayr, Pedro Pérez-Medrano, Gonzalo Alfonso Pineda, Juan Gomis, Camilo Torres
- Language: Spanish
- Year: 1968