Buira, Ariel. «Hans Bachmann. The External Relations of the Less Developed Countries. Nueva York : Praeger Special Studies in International Economics and Development, 1968. 341 P». Estudios Demográficos y Urbanos 2, no. 02 (mayo 1, 1968): 274. Accedido julio 26, 2025. https://estudiosdemograficosyurbanos.colmex.mx/index.php/edu/article/view/52.