Optimal exploitation of solid mineral resources challenges & constitution 

 - New Delhi :   12th World Mining Congress,   1984. 
 - 4V (VI. p. - V4. p.) ;   20.5 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Solid mineral resources
<br/><br/><label>Dewey Class. No.: </label>R|H 553.06  / WOR.1-.4