Purwar, A K <br/><br/>
Environment and Ecology 
/ by Anuj Kumar Purwar 
 - New Delhi:  I. K. International Pvt. Ltd.,  2020. 
 - xiii, 306p. 
<br/><br/><label>ISBN: </label>9789389872842 
<br/><br/><label>Dewey Class. No.: </label>577  / PUR/E