El cobre. 

 - [S.l.] :  s.e.,  s.f. 
 - 33p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COBRE<br/>ESTADISTICAS<br/>MINERIA<br/>SIGLO XX
<br/><br/><label>Subjects--Geographic Terms: </label><br/>CHILE
<br/><br/><label>Dewey Class. No.: </label>549.23 983/CH.535