Sharma, P. D. <br/><br/>
Environmental biology / 
P. D. Sharma. 
 - Meerut :  Rastogi Publications,  1999. 
 - xi, 416 p. :  20 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8171334040 
<br/><br/><label>Dewey Class. No.: </label>574.24  / SHA