Perthite from selected localities.
USA | |
| 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. | |
Griffitts,Wallace R.,and Olson,Jerry C.,(1953) Mica Deposits of the Southeastern Piedmont : USGS Professional Paper 248-D | |
Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D | |
Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D |