Sharma, P. D. <br/><br/>
Environmental Biology 

 - 2nd /   2003. 
 - Meerut:  Rastogi Publications,  2003. 
 - 416p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Botany, Biology. 
<br/><br/><label>Dewey Class. No.: </label>574