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USA | |
- Hot Springs Barite Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Klemic, H., Baker, R.C. (1954) Occurrences of Uranium in Carbon County, Pennsylvania. Geological Survey Circular 350, United States Department of the Interior, 8 pages. |
| (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. |
- James River-Roanoke River Mn-Fe-Ba Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Southern Section-Blue Ridge Province
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |