Ryan, Robert H., et al. Bridge into the Future: Eagle Pass, Texas. Area Economic Survey No. 18. Austin: Bureau of Business Research, 1964

Ryan, Robert H., et al. Bridge into the Future: Eagle Pass, Texas. Area Economic Survey No. 18. Austin: Bureau of Business Research, 1964, Box: 196, Folder: 11. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389725 Accessed September 27, 2026.