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Author/Creator
- United States. Congress. House. Committee on Mines and Mining16
- Calumet and Hecla Mining Company10
- Calumet & Arizona Mining Company8
- Allouez Mining Company6
- Foster, J. W. (John Wells), 1815-18735
- Osceola Consolidated Mining Company5
- St. Mary's Canal Mineral Land Company5
- Jackson, Charles T. (Charles Thomas), 1805-18804
- Lake Superior Copper Company4
- Lankton, Larry D.4
- Quincy Mining Company4
- St. John, John R.4
- Tamarack Mining Company4
- Adventure Consolidated Copper Company3
- Butler, B. S. (Bert Sylvenus), 1877-19603
- Champion Copper Company3
- Making of America Project3
- Michigan Copper Mining Company3
- New Cornelia Copper Company3
- North-West Mining Company3