Verma, P. S. <br/><br/>
Concept of ecology  environmental biology 

 - New Delhi  S. Chand & Company Ltd  1998 
 - vii,264p.  24cm 
<br/><br/><label>ISBN: </label>812191681X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Life sciences  Biology
<br/><br/><label>Dewey Class. No.: </label>577  / VER