Verma, P S. <br/><br/>
Environmental biology : principles of ecology   

 - New Delhi :   Sultan Chand and Sons,   1998. 
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life Sciences
<br/><br/><label>Dewey Class. No.: </label>574.5  / VER