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USA | |
| Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS Bull 380D |
| USGS Bull 380D |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| USGS Bull 380D |
| Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS Bull 380D |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| U.S. Geological Survey Professional Paper 297 |
| Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Rocks & Minerals: 67(6): 380-388. USGS Bull 380D |
| E.L. Clopton collection |
| (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. |
| Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology |