Effects and control of longrange transboundary air 

 - New York  United Nation U S A       1994 
 - 60p.  cm. 
 - UN, Air Pollution Studies. 10 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer Science
<br/><br/><label>Dewey Class. No.: </label>D854.1.N8, N4