JAYALAKSHMI, L. Voluntary Effort in Family Planning. The Indian Journal of Nutrition and Dietetics, [S. l.], v. 13, n. 7, p. 230–231, 1976. Disponível em: https://www.informaticsjournals.com/index.php/ijnd/article/view/11738. Acesso em: 7 may. 2024.