Columbium-rare-earth deposits, southern Ravalli County, Montana.
Crowley, Frank A.
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. .
Bibliography: p. 46-47.
gs 60000289
Niobium ores--Montana--Ravalli County.
Rare earths--Montana--Ravalli County.
TN490.N65 / C7
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. .
Bibliography: p. 46-47.
gs 60000289
Niobium ores--Montana--Ravalli County.
Rare earths--Montana--Ravalli County.
TN490.N65 / C7