U.S. Department of Labor. "Labor Law and Practice in Mexico." BLS Report No. 240, 1963

U.S. Department of Labor. "Labor Law and Practice in Mexico." BLS Report No. 240, 1963, Box: 207, Folder: 9. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389977 Accessed September 27, 2026.