Shankar IAS Academy <br/><br/>
Environment 

 - 9 Ed. 
 - Chennai  Shankar IAS Academy Book Publication  2021 
 - 504p 
<br/><br/><label>ISBN: </label>978-81-934226-0-1 
<br/><br/><label>Dewey Class. No.: </label>574.5/SHA