Verma,P S <br/><br/>
Principles of Ecology 

 - NewDelhi  S Chand & Company Ltd.  1989 
 - 591  PBB 
<br/><br/><label>ISBN: </label> 40 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>581.5  / VER