Sharma, P D. <br/><br/>
Ecology and environment / 
By P D Sharma. 
 - 13th ed. 
 - New Delhi :  Rastogi Publications,  2020. 
 - 755p. ;  00 cm. 
<br/><br/><label>ISBN: </label>9789350781227 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics.
<br/><br/><label>Dewey Class. No.: </label>333.7  / SHA