Koul Lokesh <br/><br/>
Shaishik anusandhan ki karyapranali 

 - New Delhi, India  Vikas Publishing House Pvt. Ltd.  1998 
 - 542p. 
<br/><br/><label>ISBN: </label>81-259-0604-5 
<br/><br/><label>Source: </label>TextBook