MS-078, Calumet and Hecla Inc. and Quincy Mining Company Project Records, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan.
Cite Item Description
MS-078, Calumet and Hecla Inc. and Quincy Mining Company Project Records, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan. https://michigantech.libraryhost.com/repositories/2/resources/69 Accessed November 21, 2024.
