Peck, C. B.; Combes, C. L.; et al., ed. (). 1950-52 Locomotive Cyclopedia of American Practice (ed. Fourteenth). New York: Simmons-Boardman Publishing. pp. 501, 519, 523, 545. ASINB009AF0VKU.
Coatsworth, John H. "Indispensable Railroads in a Backward Economy: The Case of Mexico," Journal of Economic History (1979) 39#4 paginile. 939–960 la JSTOR