01119cam a22002771 4500 gs 50000063 DLC 20260227111356.0 780307s1950 dcua b f000 0 eng c gs 50000063 (OCoLC)3693649 U.S. Geol. Survey. Libr. USlW OCoLC DLC QE75 .P9 no. 227 TN948.P38 H3 Copy 2. 552.1 Hanley, John B. (John Bernard), 1913- Pegmatite investigations in Colorado, Wyoming and Utah 1942-1944, by John B. Hanley, E. Wm. Heinrich and Lincoln R. Page; a report on resources of beryllium, tantalum and lithium minerals, and of muscovite. Washington, U.S. Govt. Print. Off., 1950. vi, 125 p. plates, maps (part fold. in pocket) diagrs. 29 cm. United States. Geological Survey. Professional paper 227 Bibliographical footnotes. Pegmatites. Mines and mineral resources Colorado. Mines and mineral resources Wyoming. Mines and mineral resources Utah. 28443 28443