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USA | |
| Hopkins, Oliver B. (1914) A Report on the Asbestos, Talc and Soapstone Deposits of Georgia. Bulletin 29. Geological Survey of Georgia |
| Ballard, T. J. (1948), Investigation of Track Rock Corundum Mine, Union County, Georgia, U.S. Bureau of Mines, Report of Investigation RI-4309. |
| (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. |