Roberto R. Calderon, "Union, Paz y Trabajo...", 1991

Roberto R. Calderon, "Union, Paz y Trabajo...", 1991, Box: 2, Folder: 15. Teresa Palomo Acosta Papers, 1996-27. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/386294 Accessed September 25, 2026.