Verma,P.S, <br/><br/>
Environmental Biology (Principles of Ecology)   

 - 1st /   2008. 
 - Delhi:  S.Chand & Co.Ltd.  2008. 
 - 591p.:  25cm. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Zoology, Principles of Ecology. 
<br/><br/><label>Dewey Class. No.: </label>574