Tracy,Edward B. <br/><br/>
The new world of copper 

 - New York :  Dodd,mead and company 
 - 80p.;  ill.  25cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology
<br/><br/><label>Dewey Class. No.: </label>669.3  / TRA