North, David S. "Border Closing?" The Texas Observer, undated

North, David S. "Border Closing?" The Texas Observer, undated, Box: 188, Folder: 21. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389506 Accessed September 27, 2026.