"The Latin American Collection of The University of Texas", 1937, undated

"The Latin American Collection of The University of Texas", 1937, undated, Box: 72, Folder: 1. Carlos E. Castañeda Papers, 23587615. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/357794 Accessed September 25, 2026.