Stanley Engerman, "Some Economic Issues relating to Railroad History and the Evaluation of Land Grants," Journal of Economic History 32 (June 1972): 443-63.

John H. Coatsworth, "Obstacles to Economic Growth in Nineteenth-Century Mexico," American Historical Review 38 (Feb. 1978): 99, 100.

quote, John Coatsworth, Growth against Development: The Economic Impact of Railroads in Porfirian Mexico (DeKalb: Northern Illinois Univ. Press, 1981), 150, also, 153-54, 164-65.