Vierrether, C. W. <br/><br/>
Rare-earth occurrences in the Pea Ridge tailings / 
by C.W. Vierrether and W.L. Cornell. 
 - Washington, D.C. :  U.S. Dept. of the Interior, Bureau of Mines,  1993. 
 - 10 p. :  ill. 
 - Report of investigations ;  9453 .
 - United States.  Bureau of Mines.   Report of investigations ;  9453 .
 - Report of investigations (United States. Bureau of Mines) ;  9453 .
<br/><br/><label>LCCN: </label>92033620  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rare earth metals--Metallurgy.<br/>Tailings (Metallurgy)<br/>Flotation.