Wolframite Group from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| Rocks & Minerals: 67(6): 380-388.; USGS Bull 380D; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
Fern Cliff Prospect, Unorganized mining district [1], Custer County, South Dakota, USA