Singla,Deepika <br/><br/>
NTA UGC NET/JRF/SET Paper - 2 : Environmental Science 
/ by Deepika Singla 
 - New Delhi:  Arihant Publications, 
 - 691p. 
<br/><br/><label>ISBN: </label>9789327199000 
<br/><br/><label>Dewey Class. No.: </label>574.5  / SIN/N