Chawla,Shashi <br/><br/>
A Textbook of Environmental Studies 
by Chawla,Shahi 
 - 1st 
 - Chennai  McGraw Hill Education  c2012 
 - V.P. 
<br/><br/><label>ISBN: </label>9781259006388 
<br/><br/><label>Dewey Class. No.: </label>333.707