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USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Immega, I. P. and Klein, C. (1976) Mineralogy and petrology of some metamorphic Precambrian iron-formations in southwestern Montana. American Mineralogist, 61, 1111-1144. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| HEINRICH E W 1950 MBMG MEMOIR NO 30 P 37-38 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Sheridan Mining District (Mill Creek Mining District; Wisconsin Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Burger, H.R. et. al. (2004) Geology and geochemistry of the Spuhler Peak metamorphic suite: in Precambrian Geology of the Tobacco Root Mountains, Montana: Geological Society of America Special Paper 377: 47-70 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Gobla, Michael J. (2012) Montana Mineral Locality Index. Rocks & Minerals, 87 (3) 208-240 doi:10.1080/00357529.2012.676825 |
Madison County, Montana, USA