Proceeding of the working group meeting on environment 

 - New  York United Nations USA      1982 
 - 141p.  cm. 
 - "Its, mineral resources development series, 49p." .
<br/><br/><label>Standard No.: </label>88046 
<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):8p1,N8, M2/UN"