Rooper & Chalmers Reports on Recent Visit to the Mine,, 1955

Rooper & Chalmers Reports on Recent Visit to the Mine,, 1955, Box: 140, Folder: 20. 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/346874 Accessed September 27, 2026.