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 .
<br/><br/> At head of title: State of Montana, Bureau of mines and geology, Francis A. Thomson, director ...  Photoprinted.  Some plates accompanied by descriptive letterpress. 
<br/><br/><label>LCCN: </label>gs 40000201  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--Montana.<br/>Mineral industries--Directories.
<br/><br/><label>LC Class. No.: </label>TN12  / .M55 1940 
<br/><br/><label>Dewey Class. No.: </label>622.09786