RICHARDS, ROBERT H. <br/><br/>
ORE DRESING 

 - 0 
 - NEW YORK-U.S.A.  THE ENGINIER AND MINING J  1903 
 - 643 pag.  23 cm 
 - 0  1 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ARTE
<br/><br/><label>Dewey Class. No.: </label>748.8  / R54