"Contraception." . . "Fécondité humaine Etudes transculturelles." . . "Natalidad, Limitación de la Política gubernamental." . . . . . . . . "Pregnancy, contraception and family planning services in industrialized countries : a study of The Alan Guttmacher Institute" . . . . . . . . "Cross-cultural studies" . . . . . . . . . "Pregnancy, contraception, and family planning services in industrialized countries : a study of the Alan Guttmacher Institute" . . . . . . . "Pregnancy, contraception, and family planning services in industrialized countries" . . . . . . . . "Fécondité humaine." . . "Fecundidad humana." . . "Régulation des naissances." . . "Geburtenregelung." . . . . "Industriestaaten." . . "Alan Guttmacher Institute (New York)." . . "Régulation des naissances Etudes transculturelles." . . "Alan Guttmacher institute." . . "Family Planning Services." . . "Pregnancy." . . "Cross-Cultural Comparison." . .