Kotpal, R L <br/><br/>
Concepts of Ecology  Textual Documents 
by K L Kotpal and N P Bali 
 - Jullundur  Vishal  1975 
 - viii,252p. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Dewey Class. No.: </label>615.321  / BAL