00962cam a22002771 4500 gs 51000100 DLC 20260227111357.0 780307s1950 dcua f000 0 eng c gs 51000100 (OCoLC)3693511 U.S. Geol. Survey. Libr. USlW OCoLC DLC premarc QE75 .P9 no. 229 TN933 .S9 Copy 2. 553.9 Stoll, Walter Clericus, 1915- Mica and beryl pegmatites in Idaho and Montana. A description of mines and prospects examined in each district, some illustrated by maps and structure sections. Washington, U.S. Govt. Print. Off., 1950. v, 64 p. illus., maps (8 fold. in pocket) 29 cm. Geological Survey professional paper 229 Mica Beryl Pegmatites Geological Survey (U.S.). Professional paper ; 229. 28540 28540