Brij Gopal.  x <br/><br/>
Elements of ecology.  x 

 - x 
 - New Delhi,  Vikas.  1979 
 - vi,200 
<br/><br/>x 
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology. Biology. 
<br/><br/><label>Dewey Class. No.: </label>581.5/BRE