SEMINAR OF ECONOMICS <br/><br/>
ENGINEERING MINERAL OF ECONOMIC 

 - 0 
 - LONDON-U.S.A.  MINING JOURNAL BOOKS LTD.  1976 
 - 223 pag  23 cm 
 - 0  0 .
<br/><br/>ENGINERRING-ECONOMICS 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIENCIAS APLICADAS
<br/><br/><label>Dewey Class. No.: </label>622.073  / S38