P. D. Sharma <br/><br/>
Ecology and environment 
P. D. Sharma 
 - 13th 
 - New Delhi  Rastogi Publications  2018 
 - 755P. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9789350781227  625 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>591.5  / SHA