VERMA (P S) and AGARWAL (V K) <br/><br/>
Principles of ecology 

 - 4 
 - ND  S. Chand & Co. Ltd.  1989 
 - viii,591 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology Environmental Biology
<br/><br/><label>Dewey Class. No.: </label>574.5 VERP