Barrett W.Gray ODUM,Eugene P <br/><br/>
Fundamentals  of  Ecology 

 - 5th 
 -  CENGAGE Learning India pvt .Ltd., New Delhi,  2005 
 - 596p 
<br/><br/><label>ISBN: </label>978-81-315-0020 
<br/><br/><label>Dewey Class. No.: </label>577  / ODU/F