Calumet and Hecla Consolidated Copper Company Geological Division
Archival Resources
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| referencedIn | Calumet and Hecla Mining Company. Calumet and Hecla Mining Companies Geological Map Collection, Circa 1896-Circa 1966. | Michigan Technological University, J.R. Van Pelt & Opie Library; Michigan Tech |
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| associatedWith | Calumet and Hecla Mining Company | corporateBody |
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