KELLER, A. Bernard Berelson (compilador). Family Planning Programs : An International Study. Nueva York : Basic Books, Inc., 1969. 303 p. Estudios Demográficos y Urbanos, [S. l.], v. 4, n. 03, p. 389–391, 1970. DOI: 10.24201/edu.v4i03.1529. Disponível em: https://estudiosdemograficosyurbanos.colmex.mx/index.php/edu/article/view/1529. Acesso em: 27 jun. 2022.