Sources

Drier, Roy W. and Octava J. Du Temple, Prehistoric Copper Mining in the Lake Superior Region, 1961, privately published

West, George A. Copper: Its Mining and Use by the Aboriginies of the Lake Superior Region, Milwaukee Public Museum Bulletin 10, 1929

Holmes, W.H., Aboriginal Copper Mines of Isle Royale, Lake Superior, American Anthropologist (new series) 3, pp.684-696

Landon, R.H., The Mining and Fabrication of Copper by the Aborigines of the Lake Superior Region, The Minnesota Archeologist  6(2) pp.27-34

Griffin, James B., Lake Superior Copper and the Indians: Miscellaneous Studies of Great lakes Prehistory, Anthropological Papers 17, Museum of Anthropology, Univ. of Mich., 1961

Straw, Burton, Copper Mining Hammerstones from Upper Michigan, The Wisconsin Archeologist 43, 1962

Brown, Charles E., The Native Copper Implemetns of Wisconsin and The Native Copper Ornaments of Wisconsin, The Wisconsin Archeologist (old series 3, 1904

Ritzenthaler, Robert (editor), The Old Copper Culture of Wisconsin (six earlier articles from the Wisconsin Archeologist), The Wisconsin Archeologist 38 (4), 1957

Martz, Henrietta, Atlantis: Dwelling place of the Gods, privately published, 1967

Sodders, Betty, Michigan Prehistory MysteriesI & II, Avery Color Studies, 1990 & 1991

Kennedy, Clyde C., Preliminary Report on the Morrsison's Island-6 Site, National Museum of Canada, Bulletin No.106, Anthropological Series No.72, 1966

Fox, G.R., The Ancient Copper Workings on Isle Royale, The Wisconsin Archeologist 10(2), pp.73-100, 1910

Phillips, G.B., A prehistoric Copper Mine, The Wisconsin Archeologist 2(3) pp.151-154, 1921

Winn, V., Ornamental Copper of the Wisconsin Area, The Wisconsin Archeologist 23(3), pp.49-85, 1942

Mason, R.J., The Age of the Old Copper Culture, The Wisconsin Archeologist 42(4),pp.143-155, 1961

Peterson, David H., Red Metal Poundings and the "Neubauer Process": Copper Culture Metallurgical

Technology, CSASI Journal

Information for this site also comes from more than 30 years of personal collecting experience and research by my father, Dr. E.W. Johnson, and myself, David Johnson.