Richards, Robert H.  1844-1945. <br/><br/>
General Index to the four volumes of Ore dressing, 
by Robert H. Richards ... 
 - London  1908. 
 - 112 pages  illustrations and diagrams part fold  24 cm. 
<br/><br/> Paged continuously. 
<br/><br/>includes the index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ore-dressing.
<br/><br/><label>LC Class. No.: </label>TN500  / RIC