NADAL EGEA, Alejandro. William K. Gamble y Eduard L.Venecian. The agricultural development of Mexico. Nueva York : Frederick Praeger, Publishers, 1969. Foro Internacional, México, Ciudad de México, v. 10, n. 2, p. 213–215, 1969. Disponível em: https://forointernacional.colmex.mx/index.php/fi/article/view/420. Acesso em: 6 jun. 2025.