Preston, Lee E. <br/><br/>
Exploration for non-ferrous metals :  an economic analysis / 
Lee E. Preston 
 - Washington :  RFF ,  1960 
 - x, 198p. :  ill. ;  20 cm.  
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources--United States<br/>Nonferrous metal industries<br/>Minerals
<br/><br/><label>Dewey Class. No.: </label>553.1  / PRE