P.S. Verma <br/><br/>
Environmental Biology  Principles of Ecology 

 - New Delhi  S chand  1998 
 - 591 p. 
<br/><br/><label>ISBN: </label> 80 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology
<br/><br/><label>Dewey Class. No.: </label>574  / VER