MS-790, Unprocessed Material from the Calumet and Hecla Mining Company Library Building, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan.
Cite Item Description
MS-790, Unprocessed Material from the Calumet and Hecla Mining Company Library Building, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan. https://michigantech.libraryhost.com/repositories/2/resources/454 Accessed November 01, 2024.
