01181cam a22002891 4500 gs 40000201 DLC 20260227111345.0 780227s1940 xx 000 0 eng c gs 40000201 (OCoLC)3674163 U.S. Geol. survey. Library OT DLC premarc TN12 .M55 1940 622.09786 Mineral resources survey. Directory of Montana mining properties. Compiled by Work projects administration, Mineral resources survey. (O.P. 65-1-91-24 W.P. 2986) In cooperation with the Mining association of Montana. Butte, Mont., Montana school of mines, 1940. vi, 135 p. 29 pl. (maps, 1 fold.) 28 cm. Montana. State bureau of mines and geology. Memoir no. 20 At head of title: State of Montana, Bureau of mines and geology, Francis A. Thomson, director ... Photoprinted. Some plates accompanied by descriptive letterpress. Mines and mineral resources Montana. Mineral industries Directories. Mining association of Montana. 27645 27645