Verma, P.S <br/><br/>
Environmental biology (Principles of Ecology) 

 - 4th ed 
 - New Delhi  S. Chand  1989 
 - viii,591p.   
<br/><br/><label>ISBN: </label>8121908590 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BIOLOGY
<br/><br/><label>Dewey Class. No.: </label>574.5  / VER