García y Garma, I.O. 1984. Donald P. Warwick, Bitter Pills, Population Policies & Their Implementation in eight developing countries, Cambridge University Press, 1983, 229 p. Estudios Demográficos y Urbanos. 18, 03 (jul. 1984), 493–495. DOI:https://doi.org/10.24201/edu.v18i03.1674.