Preliminary Report by H.I. Altshuler,, 1954 July

Preliminary Report by H.I. Altshuler,, 1954 July, Box: 143, Folder: 11. 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/346908 Accessed September 27, 2026.