MS-263, Calumet and Hecla Mining Company Smelter Correspondence, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan.
Cite Item Description
MS-263, Calumet and Hecla Mining Company Smelter Correspondence, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan. https://michigantech.libraryhost.com/repositories/2/resources/132 Accessed November 21, 2024.
