Sengar, RS and Kumar, Amit <br/><br/>
Environment Science  :  Question Bank / 
RS Sengar and Amit Kumar  
 - New Delhi :  CBS Publishers & Distributors ,  2017 . 
 - 639p 
<br/><br/><label>ISBN: </label>9789386478276 
<br/><br/><label>Dewey Class. No.: </label>371.26  / SEN