Programa Nacional Fronterizo. Boletín, Vol. 7, no. 75-76 and vol. 9, 1967 August-September, 1969 January

Programa Nacional Fronterizo. Boletín, Vol. 7, no. 75-76 and vol. 9, 1967 August-September, 1969 January, Box: 192, Folder: 10. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389643 Accessed September 27, 2026.