«Concentration of Economic Power and Protection of Freedom of Expression», por Adolf A. Berle. The Annals of the American Academy of Political and Social Science, vol. 300, julio 1955
Tierno Galván, Enrique (1957). «Concentration of Economic Power and Protection of Freedom of Expression», por Adolf A. Berle. The Annals of the American Academy of Political and Social Science, vol. 300, julio 1955. ANUARIO DE FILOSOFÍA DEL DERECHO . pp. 570-571.
