Choubey, Shweta. <br/><br/>
Textbook of environment and ecology 

 - New Delhi :  Dhanpat Rai And Sons,  1994 
 - 394. 
<br/><br/><label>ISBN: </label>9788177000252  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sanitary municipal engineering
<br/><br/><label>Dewey Class. No.: </label>628.5  / CHO