Joung, J. E. <br/><br/>
Mining the earth / 
J. E. Joung 
 - New York :  Worldwatch Institute (WI) ,  1992 
 - 53p. :  ill. ;  20 cm.  
 - Worldwatch paper  No. 109 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining
<br/><br/><label>Gov. Doc. Class. No.: </label>US WI P-109