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USA | |
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| The Lapidary Journal, May 1985 (W.C. van Laer)
The Mineral News (several issues)
many ID by x-ray diffraction (Jim Wilson, Weber State
W.C. van Laer, Montana Tech
U.S. National Museum
some by physical characteristics, i.e.: crystal form, fluorescence, magnetic attraction, etc.) some yet to be published |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Gabe Cangelosi Collection |
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| Knopf, A. (1913) Ore Deposits of the Helen Mining Region, Montana. United States Geological Survey, Bulletin 527, 143 pages. |
- Whitehall Mining District (Cardwell Mining District)
| Gnanou, Hamadou (2018) Mineralogy and sulfur isotope geochemistry of the Apex and Bonanza prospects at the Golden Sunlight mine, Montana. Montana Tech of The University of Montana. 78pp. |
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| Barrick Gold Corporation |
Elkhorn Iron Mine, Elkhorn Mining District, Jefferson County, Montana, USA