Sharma, P. D. <br/><br/>
Ecology and environment 
P. D. Sharma 
 - 13th ed. 
 - Meerut  Rastogi Publication  2017 
 - xix, 755p. 
<br/><br/><label>ISBN: </label>978-93-5078-122-7 
<br/><br/><label>Dewey Class. No.: </label> / SHA