Singh, Gurdev <br/><br/>
Information sources, services and systems 

 - Delhi  PHI Learning Private Limited  2013 
 - xviii, 517p. 
<br/><br/><label>ISBN: </label>9788120346390 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information sources<br/>Services and systems<br/>Reference book<br/>Retrieval system
<br/><br/><label>Dewey Class. No.: </label>025.524 Si643i