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Northwest
6
Northwest history
Pacific
6
Pacific -- History -- 20th century
mining industry
6
Mines and mineral resources -- Northwest
4
mineral resources
4
Idaho
3
Mining industries -- Northwest
3
method of mining
3
mills
3
Biggs
2
C. E.
2
C. E. Biggs
2
Charles W.
2
E. B.
2
E. B. Quackenbush
2
Evis gold mine
2
George Jackson
2
Humboldt Mining and Milling Company
2
L. O.
2
L. O. Tollefson
2
Leon Starmont
2
Mineral industry -- Mergers -- Northwest
2
Mining -- Mining -- Northwest
2
Mining corporations -- Northwest
2
Mining engineering -- Northwest
2
Noble
2
O. P.
2
O. P. Thompson
2
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