Crowley, Frank A. <br/><br/>
Columbium-rare-earth deposits, southern Ravalli County, Montana. 

 - Butte,  Montana School of Mines,  1960. 
 - iv, 47 p.  maps.  28 cm. 
 - Montana. Bureau of Mines and Geology. Bulletin  18 .
 - Bulletin (Montana Bureau of Mines and Geology) ;  18. .
<br/><br/>Bibliography: p. 46-47. 
<br/><br/><label>LCCN: </label>gs 60000289  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Niobium ores--Montana--Ravalli County.<br/>Rare earths--Montana--Ravalli County.
<br/><br/><label>LC Class. No.: </label>TN490.N65  / C7