Singh, Gurdev. <br/><br/>
Information sources, services and systems /  
Gurdev Singh. 
 - /   . 
 - New Delhi :   PHI Learning ,   2013. 
 - xviii,517p. :   figs.,(some col.),tables ;   23cm .  
<br/><br/>Includes bibliography and index 
<br/><br/><label>ISBN: </label>9788120396390  RS525.00 
<br/><br/><label>Subjects--Index Terms: </label>INFORMATION SERVICES 
<br/><br/><label>Dewey Class. No.: </label>025.52  / SIN/I