Hübnerite from Pennington County, South Dakota, USA
USA | |
| USGS Bull 380D |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. | |
| Dana 6: 1088 Rocks & Minerals: 10: 121-122,146-147. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |