Richards, Robert H. <br/><br/>
Textbook of ore dressing / 
[por] Robert H. Richards 
 - 3rd edition. 
 - xiii, 608 páginas :  ilustraciones 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minerales
<br/><br/><label>LC Class. No.: </label>TN500  / R5