[Social and psychological study of birth control in 100 middle-class families].
D002677:Chile; D003276:Contraceptives, Oral; D005193:Family Planning Services; D011593:Psychology, Social; D012959:Socioeconomic Factors
D003276:Contraceptives, Oral
Estudio psicosocial de la regulación de la natalidad en 100 familias de la clase media.