Praeglo, Valdimar. "Mexican Border Industrialization Program, Related Issues, and Their Impact on the U.S Border States: A Survey." N.p. [typescript], undated

Praeglo, Valdimar. "Mexican Border Industrialization Program, Related Issues, and Their Impact on the U.S Border States: A Survey." N.p. [typescript], undated, Box: 192, Folder: 4. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389615 Accessed September 27, 2026.