Gurdev singh <br/><br/>
Information sources, services and systems / 
Gurdev Singh 
 - Delhi :  PHI Learning,  2013 
 - xviii, 517 p. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9788120346390(pbk.)  Rs.525.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information services<br/>Information resources<br/>Information resources management
<br/><br/><label>Dewey Class. No.: </label>025.52