Warner, J. Dean. <br/><br/>
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. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Niobium ores--Alaska--Tofty Region.<br/>Ore-deposits--Alaska--Tofty Region.<br/>Geology--Alaska--Tofty Region.
<br/><br/><label>LC Class. No.: </label>TN295  TN490.N65  / .U4 no. 9105 
<br/><br/><label>Dewey Class. No.: </label>622 s  553.4/99�19