YADAV, P.R. <br/><br/>
Environmental biology/ 
YADAV, P.R. 
 - New Delhi :   Discovery Publishing,   c2011. 
 - 302 pages :   illustrations ;   22 cm. 
<br/><br/><label>ISBN: </label>81-7141-756-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1. Environmental problems.