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USA | |
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| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
- Guffey Mining District (Freshwater Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Foord, E. E., & Shawe, D. R. (1989). The Pb-Bi-Ag-Cu-(Hg) Chemistry Of Galena And Some Associated Sulfosalts: A Reviewand Some New Data From Colorado, California And Pennsylvania. Canadian Mineralogist, 27, 363-382. |
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| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Tarryall Springs Mining District (Puma City)
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
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| Am Min 49:430-435 |
- Pipestone Mining District
- Delmoe Lake Road occurrences
| Gibson, R.I., 2017, Geology and mineralogy of the eastern margin of the Butte Pluton, Montana: Proceedings, Montana Mining and Mineral Symposium 2017, Montana Bureau of Mines and Geology, in press. |
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| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
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| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
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| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
Taos County, New Mexico, USA