Tiwari ,Purushotham. <br/><br/>
Digital Library 

 - New Delhi :  A p H Publishing,  2015 
 - 285p.  22cm. 
<br/><br/><label>ISBN: </label>81 313 0036 6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Information
<br/><br/><label>Dewey Class. No.: </label>025