01037cam a22002771 4500 gs 44000050 DLC 20260227111350.0 790612r1944uuuusdua b s000 0 eng gs 44000050 (OCoLC)5056996 DLC TxCM DLC premarc QE461 .G9 Gwynne, Charles Sumner, 1885- Pegmatites in the Beecher Rock basin, by Charles S. Gwynne. Vermillion, S.D., University of South Dakota, 1944. 23 p. illus. South Dakota Geological Survey. Report of investigations, no. 48 At head of title: State of South Dakota, M. Q. Sharpe, Governor. State Geological Survey, E. P. Rothrock, State Geologist. Reproduced from type-written copy. "Selected bibliography": leaf at end. Pegmatites. Geology South Dakota Custer County. Report of investigations (South Dakota Geological Survey) ; no. 48. 27961 27961