Kunhardt, Wheaton B. <br/><br/>
The practice of ore dressing in Europe 

 - 2a ed. 
 - New York  John Wiley &amp; Sons  1901 
 - 110 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERALES<br/>TRATAMIENTO
<br/><br/><label>Universal Decimal Class. No.: </label>A/622.7/K94