Tewatia, Gulshan. <br/><br/>
Earthworm ecology 

 - New Delhi  Discovery Publishing House  2007 
 - 279p. 
<br/><br/><label>ISBN: </label> RS 725.00 
<br/><br/><label>Source: </label> RS 725.00 
<br/><br/><label>Dewey Class. No.: </label>595.146 TEW