Botkin, Daniel B; Keller, Edward A <br/><br/>
Environmental science: Earth as a living planet 

 - 2 
 -  New Central Book Agency, Calcutta  1997 
 - 648 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology; Biology
<br/><br/><label>Dewey Class. No.: </label>R 574.5  BOT-E2