Verma, P. S. <br/><br/>
Environmental biology 
P. S. Verma and V. K. Agarwal 
 - New Delhiu  S. Chand  2012 
 - 591 P. 
<br/><br/><label>ISBN: </label>9788121908597  190 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental biology
<br/><br/><label>Dewey Class. No.: </label>591.5  / VER