USBM OFR 174-84
Title:Columbium in the gold- and tin-bearing placer deposits near Tofty, Alaska
Publisher:U.S. Bureau of Mines
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Southworth, D.D., 1984, Columbium in the gold- and tin-bearing placer deposits near Tofty, Alaska: U.S. Bureau of Mines Open-File Report 174-84, 21 p.
- ofr174_84.pdf (2.2 M)