Warner, J. Dean.
A columbium-bearing regolith on Upper Idaho Gulch, near Tofty, AK / by J. Dean Warner, C. L. Mardock, and D. C. Dahlin. - [Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, [1986] - iv, 29 p. : ill. - Information circular ; 9105 . - Information circular (United States. Bureau of Mines) ; 9105. .
Niobium ores--Alaska--Tofty Region.
Ore-deposits--Alaska--Tofty Region.
Geology--Alaska--Tofty Region.
TN295 TN490.N65 / .U4 no. 9105
622 s 553.4/99�19
A columbium-bearing regolith on Upper Idaho Gulch, near Tofty, AK / by J. Dean Warner, C. L. Mardock, and D. C. Dahlin. - [Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, [1986] - iv, 29 p. : ill. - Information circular ; 9105 . - Information circular (United States. Bureau of Mines) ; 9105. .
Niobium ores--Alaska--Tofty Region.
Ore-deposits--Alaska--Tofty Region.
Geology--Alaska--Tofty Region.
TN295 TN490.N65 / .U4 no. 9105
622 s 553.4/99�19