W.H.O <br/><br/>
Manual on urban air quality management 

 - 1st Ed. 
 - New Delhi  UBS Publishers and Distributors Pvt.Ltd.  1990 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil Engineering
<br/><br/><label>Dewey Class. No.: </label>624  / WH-M