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USA | |
| ANNUAL REPORT OF THE COMMISSIONER OF MINERAL STATISTICS OF THE STATE OF MICHIGAN, FOR 1882. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Harder, E. C., Johnston, A. W. (1918) Preliminary Report on the Geology of East Central Minnesota Including the Cuyuna Iron-ore District. Bulletin 15. Minnesota Geological Survey |
| Schmidt, R.G. (1963) Geology and ore deposits of the Cuyuna North Range, Minnesota: U.S. Geological Survey Professional Paper 407, 96 p. |
| Schmidt, R.G. (1963) Geology and ore deposits of the Cuyuna North Range, Minnesota: U.S. Geological Survey Professional Paper 407, 96 p. |
| Harder, E. C., Johnston, A. W. (1918) Preliminary Report on the Geology of East Central Minnesota Including the Cuyuna Iron-ore District. Bulletin 15. Minnesota Geological Survey |
| Schmidt, R.G. (1963) Geology and ore deposits of the Cuyuna North Range, Minnesota: U.S. Geological Survey Professional Paper 407, 96 p. |
| Schmidt, R.G. (1963) Geology and ore deposits of the Cuyuna North Range, Minnesota: U.S. Geological Survey Professional Paper 407, 96 p. |