Sharma, P. D. <br/><br/>
Elements of ecology / 
P D Sharma. 
 - 5th ed (reprinted) 
 - Meerut :  Rastogi Publications,  1984. 
 - xiv,420 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Science
<br/><br/><label>Dewey Class. No.: </label>574.5