|U.S. Bureau of Mines Publications, Alaska|
U.S. Bureau of Mines Open File Report 174-84
|Title:||Columbium in the Gold- and Tin-Bearing Placer Deposits near Tofty, Alaska|
|Author:||Dennis D. Southworth|
|Availability:||OFR 174-84 (PDF format, 2,183 Kb)|
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