Feldspar Group from selected localities.
USA | |
| 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. WM.,Klepper, Montis R. and Jahns, Richard H.,(1953) Mica Deposits of the Southeastern Piedmont, Part 9 and 10 :USGS Professional Paper 248-F |