Macias, Isidro Ramon. "Evolution of the Mind and a Plan for Political Action", 1969 May

Macias, Isidro Ramon. "Evolution of the Mind and a Plan for Political Action", 1969 May, Box: 182, Folder: 2. Julian Samora Papers, 24426265. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/389353 Accessed September 27, 2026.