Agrawal, K M, et. al. <br/><br/>
Textbook of environment 

 -   Macmillan India Ltd., Delhi  2002 
 - 454 
<br/><br/><label>ISBN: </label>2956 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Sanitary and municipal engineering, Environmental protection engineering
<br/><br/><label>Dewey Class. No.: </label>628  AGR-T