Sorensen, Roy T. <br/><br/>
Evaluation of alumina extraction from coal waste: composition and availability 
Sorensen, Roy T. 
 - Washington  Bureau of mines  4807 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>MINAS DE CARBON<br/>ALUMINA
<br/><br/><label>Universal Decimal Class. No.: </label>622.33:666.762.11