WIONCZEK, Miguel S. Naciones Unidas. Trade expansion and economic integration among Developing Countries. Nueva York : N.U., 1967. viii, 106 p. Foro Internacional, México, Ciudad de México, v. 9, n. 2, p. 219–221, 1968. Disponível em: https://forointernacional.colmex.mx/index.php/fi/article/view/395. Acesso em: 21 jun. 2025.