La Frontera del Norte (session 1) Part 1-2 [both sides, un-numbered], 1970

La Frontera del Norte (session 1) Part 1-2 [both sides, un-numbered], 1970, Box: 259, Item: 9. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/390933 Accessed September 26, 2026.