Optimal exploitation of solid minerals resources:   Challenges and constraints 
/ 12th congress of world mining congress 
 - New Delhi:    12th congress of world mining congress,   1984 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Subjects--Index Terms: </label>Ecology 
<br/><br/><label>Universal Decimal Class. No.: </label>622.2(082.2)  / M4-1