por Ardila, Rubén, 1942- [autor].
por Conference on Sex and Behavior (1961-1962 : Berkeley, California) | Beach, Frank A. (Frank Ambrose), 1911-1988 [editor] | Ardila, Rubén, 1942- [traductor] | Martínez Corso, Andrés [traductor] | Suárez, Armando [traductor] | Conference on Sex and Behavior (1961-1962 : Berkeley, California) Sex and behavior.