"Los Productos básicos en el decenio de los 70,"Comercio exterior 26 (4), April 1976

"Los Productos básicos en el decenio de los 70,"Comercio exterior 26 (4), April 1976, Box: 15, Folder: 12. Guy F. Erb Records of the Mexico-U.S. Business Committee and Related Materials, 2004-54. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/450426 Accessed September 26, 2026.