Verma, P.S  Agarwal, V.K <br/><br/>
Concepts of ecology  (Environmental biology) 

 - 1st ed. 
 - New Delhi  S.chand  1999 
 - vii,264 
<br/><br/>Includes 
<br/><br/><label>ISBN: </label>81219168 1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology Ecology 
<br/><br/><label>Dewey Class. No.: </label>577/V522c