Wad from
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Cook, Robert B. (1978) Minerals of Georgia: Their Properties and Occurrences. Bulletin 92. State of Georgia Department of Natural Resources |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Stose,G.W., and Schrader,F.C.,(1923) Manganese Deposits Of East Tennessee: USGS Bulletin 737 |
R&M 72:4 pp 268-270 | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |