Agrawal, K. C. <br/><br/>
Environmental biology 
K. C. Agrawal 
 - 2nd ed. 
 - Bikaner  Nidhi Publishers  2008 
 - 552p. 
<br/><br/><label>ISBN: </label>81-89153-02-1 
<br/><br/><label>Dewey Class. No.: </label>574.5  / AGR