TY  - BOOK
AU  - Crowley,Frank A.
TI  - Columbium-rare-earth deposits, southern Ravalli County, Montana
T2  - Montana. Bureau of Mines and Geology. Bulletin
AV  - TN490.N65 C7
PY  - 1960///
CY  - Butte
PB  - Montana School of Mines
KW  - Niobium ores
KW  - Montana
KW  - Ravalli County
KW  - Rare earths
N1  - Bibliography: p. 46-47
ER  -