Geological maps (scale 1:60,000),, 1954 April

Geological maps (scale 1:60,000),, 1954 April, Box: OV, Folder: 6. Saint John d'El Rey Mining Company Records, 1984-12. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/347606 Accessed September 26, 2026.