Ali Amjad <br/><br/>
Reference service and the digital sources of information 

 - N.d. 
 - New Delhi  ESS ESS PUBLICATIONS.  2004 
 - 392 p. 
<br/><br/><label>ISBN: </label>81-7000-413-6 
<br/><br/><label>Subjects--Index Terms: </label>Reference service