O. U. V, . (1966) «Unity and Diversity in Sociology. Transactions of the Sixth World Congress of Sociology. Actes du Sixième Congrès Mondial de Sociologie. Vol. I», Revista Mexicana de Sociologí­a, 28(4), pp. 939–944. doi: 10.22201/iis.01882503p.1966.4.58671.