Lewis, R. S. <br/><br/>
Elements of mining / 

 - 2nd ed. 
 - New York :  John Wiley and Sons,   1945. 
 - ix, 570 p. :  ill. ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining methods<br/>Mining technology<br/>Mineral extraction
<br/><br/><label>Dewey Class. No.: </label>622 LEW