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USA | |
| Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84 |
| Pogue,J.E.,(1910) The Cid district of Davidison County,North Carolina, former Steve Adams collection. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84 |
- Silver Hill Mining District
| Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |