1. Para cambiar su vida Publication: Airlie, Va. : George Washington University Airlie Center, 1977 Subject(s): ContraceptionFamily Planning ServicesCondomsVasectomyFarmersEl SalvadorAsociación Demográfica Salvadoreña.
2. Are you sure you know what family planning is all about? Publication: [Washington, D.C.] : U.S. Department of Health, Education, and Welfare, Public Health Service, [197-?] Subject(s): Family Planning ServicesVasectomyContraception