Rubio, Roberto. “Agricultural Exports As an Explanatory Factor of Poor Development: The Ecological Situation of El Salvador (1950-1979)”. Realidad: Revista de Ciencias Sociales y Humanidades, no. 32 (April 30, 1993): 187–223. Accessed December 6, 2025. https://camjol.info/index.php/REALIDAD/article/view/5308.