MS-558, Copper Mining and Copper Smelting Patents, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan.
Cite Item Description
MS-558, Copper Mining and Copper Smelting Patents, Michigan Technological University Archives and Copper Country Historical Collections, Houghton, Michigan. https://michigantech.libraryhost.com/repositories/2/resources/244 Accessed January 31, 2025.
