Richards, Robert H.  1844-1945. <br/><br/>
Ore dressing. Volume 1 / 
by Robert H. Richards. 
 - Second edition 
 - xxix, 643 pages :  illustrations ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ore-dressing.
<br/><br/><label>LC Class. No.: </label>TN500  / RIC