VERMA, P. S. <br/><br/>
ENVIRONMENTAL BIOLOGY PRINCIPLES OF ECOLOGY 

 - NEW DELHI  S.CHAND & COMPANY  1995 
 - 591:  25CM. 
<br/><br/><label>Subjects--Index Terms: </label>Ecology 
<br/><br/><label>Dewey Class. No.: </label>577 VER