WORLD Health Organization <br/><br/>
Guidlines for air quality 

 - Geneva  WHO  2000 
 - xvi, 189 p. 
<br/><br/><label>ISBN: </label>137994 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air pollution
<br/><br/><label>Dewey Class. No.: </label>363.7392WOR