| Heinrich, E. WM.,Klepper, Montis R. and Jahns, Richard H.,(1953) Mica Deposits of the Southeastern Piedmont, Part 9 and 10 :USGS Professional Paper 248-F Heinrich, E. William, Klepper, Montis R. and Jahns, Richard H. (1953), Mica Deposits of the Southeastern Piedmont, Parts 9 & 10: USGS Professional Paper 248-F, 290-291. |