Roybal, August. "The Obscured History of Spanish Colorado." Reprinted from El Progreso, 1968 May

Roybal, August. "The Obscured History of Spanish Colorado." Reprinted from El Progreso, 1968 May, Box: 196, Folder: 5. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389719 Accessed September 27, 2026.