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USA | |
| (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. |
- Silver Hill Mining District
| Christopher P.Indorf,1981,Economic Geology (v.76,p.1170)The Silver Hill zinc deposit and associated deposits,central North Carolina |
| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
| Bannister,Cowan and Company (1869) The Resources of North Carolina:Its Natural Wealth,Condition,and Advantages,as Existing in 1869 |
| Pogue, J. E. Jr. (1910) The Cid Mining District of Davidson County, North Carolina: North Carolina Geological and Economic Survey (NCGS) Bulletin No.22, 144p. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |