Verma, P.S. and Agarwal, V.K . <br/><br/>
Principles of Ecology 
(Environmental Biology) 
 - New Delhi  S. Chand & Company Ltd.  1983 
 - 590 
<br/><br/> 006491 
<br/><br/><label>Publisher. No.: </label> Higginbothams 
<br/><br/><label>Subjects--Personal Names: </label> MSc Botany 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MSc Botany