Proceedings. 

 - New York  United Nations USA         1970 
 - viii, 350p.  cm. 
 - United Nations, mineral resources development series, 34. .
<br/><br/> United nations, economic commission for asia and the far east, publication. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minings
<br/><br/><label>Dewey Class. No.: </label>X9(HZ):(Z)p1,N69, L0