Biotite from selected localities.
USA | |
| Wilson,W.F and McKenzie, B.J , 1978, Mineral Collecting Sites In North Carolina, Information Circular 24 |
Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D | |
U.S. Geological Survey (2005) Mineral Resources Data System:U.S. Geological Survey,Reston,Virginia | |
GSA Southeastern Section - 60th Annual Meeting (23–25 March 2011) Paper No. 1-58 |