National strategies and policies for air pollution 

 - New York  United Nation U S A       1987 
 - 55p.  cm. 
 - UN, Convention On Longrange Transboundary Air Pollution .
<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, M7/UN