Pontones Ch., Eduardo. "La migración en México." Preparado para deliverar en el IV International Congress of Mexican Studies, Santa Monica, 1973 October 17-21

Pontones Ch., Eduardo. "La migración en México." Preparado para deliverar en el IV International Congress of Mexican Studies, Santa Monica, 1973 October 17-21, Box: 191, Folder: 17. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389596 Accessed September 27, 2026.