Environmental ecology 

 - New Delhi :  Akashdeep,  1992. 
 - 502p.;  22cm 
<br/><br/><label>ISBN: </label>81-7158-243-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574.5  / ENV