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USA | |
| Rocks & Minerals 75:6, p. 404 |
| Grout, F. (1949) The titanifeorus magnetites of Minnesota, Office of the Commissioner of the Iron Range Resources and Rehabilitation: 117 p. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Raič, S., Mogessie, A., Benkó, Z., Molnár, F., Hauck, S., & Severson, M. (2015). Arsenic-rich Cu-Ni-PGE mineralization in Wetlegs, Duluth complex, St. Louis county, Minnesota, USA. The Canadian Mineralogist, 53:105-132 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Unspecified locality, Duluth Gabbro occurrence, Lake County, Minnesota, USA