01033cam a22003011a 4500 gs 55000229 DLC 20260227111403.0 760702s1955 dcu b 000 0 eng gs 55000229 (OCoLC)2293799 DLC NFredU DNAL DLC QE75 .B9 no. 1011 QE461 .T5 407 G29B no.1011 X400 Thurston, W. R. (William Roberts), 1915- Pegmatites of the Crystal Mountain district, Larimer County, Colorado / by William R. Thurston. Washington, [D.C.] : U.S. G.P.O., 1955. vi, 185 p. : ill., maps (some col.) ; 24 cm. Geological Survey bulletin ; 1011 Thirteen folded leaves in pocket. Bibliography: p. 111-112. Pegmatites. Petrology Colorado Larimer County. Borings Colorado Larimer County. Mines and mineral resources Colorado Larimer County. 28968 28968