Gunther, C. Godfrey <br/><br/>
Electro-magnetic ore separation 

 - New York  Hill Publishing Company  1909 
 - 193 p.  ilus. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERALES<br/>SEPARACION MAGNETICA
<br/><br/><label>Universal Decimal Class. No.: </label>A/622.77/G93