BARKIN, David Peter. Cuba 1968 : Supplement to the Statistical Abstract of Latin America. University of California at Los Angeles : Latin American Center, 1970. Foro Internacional, México, Ciudad de México, v. 12, n. 1, p. 116–118, 1971. Disponível em: https://forointernacional.colmex.mx/index.php/fi/article/view/504. Acesso em: 10 ago. 2025.