Richards, Robert H.  1844-1945 <br/><br/>
Textbook of ore dressing 
by Robert H. Richards...and Charles E. Locke ... assisted by Reinhardt Schuhmann, jr. 
 - 3d ed., completely rev. and rewritten 
 - New York and London  McGraw-Hill Book Company, inc.  1940 
 - xiii, 608 p.  illus., fold.pl., diagrs.  24 cm. 
<br/><br/><label>LCCN: </label>40010540  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ore-dressing
<br/><br/><label>LC Class. No.: </label>TN500  / .R53 1940 
<br/><br/><label>Dewey Class. No.: </label>622.7