Gupta, Vishwa Prakash <br/><br/>
Information services 

 - New Delhi  Mahaveer & Sons  2007 
 - 424p. 
<br/><br/><label>ISBN: </label> RS 1050.00 
<br/><br/><label>Source: </label> RS 1050.00 
<br/><br/><label>Dewey Class. No.: </label>025.5 GUP