1. Colombia: The Family in Candelaria
2. Anonymous. 1964. “La Encuesta Hall.” Caretas 296 (14, August 29): 30–38.
3. Anonymous. 1965. “Birth Control Efforts Viewed.” San Juan Star (December 17): 39.
4. Bachmann, Carlos. 1969. “Programa de la Maternidad de Lima para la Prevención del Aborto Inducido.” Tribuna Médica 5 (224): 1–11.
5. A Colombian View of the Condom