Richards, Robert H.  1844-1945. <br/><br/>
Ore dressing / 
by Robert H. Richards. 
 - First edition    second impression, in four volumes (volume 111) 
 - xxv, 1610 pages ;  illustrations,   24 cm 
<br/><br/> Paged continuously. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ore-dressing
<br/><br/><label>LC Class. No.: </label>TN500  / RIC