Proceedings of the sixth session of the committee 

 - New  York United nations USA      1980 
 - 167p.  cm. 
 - "Its, Mineral resources development series, 47." .
<br/><br/><label>Standard No.: </label>87551 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minings
<br/><br/><label>Dewey Class. No.: </label>"X9(HZ).1.N7, M0/UN"