Sharma, P.D. <br/><br/>
Ecology and Environment 

 - 7th /   1998. 
 - Meerut:  Rastogi Publications,  1998. 
 - 660 p. 
<br/><br/><label>ISBN: </label>817133380x 
<br/><br/><label>Subjects--Personal Names: </label><br/>Zoology, Ecology. 
<br/><br/><label>Dewey Class. No.: </label>574.5