Bustamante, Jorge. "La Economia de la Frontera Norte de México." N.p., undated

Bustamante, Jorge. "La Economia de la Frontera Norte de México." N.p., undated, Box: 157, Folder: 8. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/388708 Accessed September 27, 2026.