GURDEV SINGH <br/><br/>
Information sources, services and systems 

 - New Delhi  PHI Learning  2013 
<br/><br/><label>ISBN: </label>9788120346390 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information Sources<br/>Library and Information science
<br/><br/><label>Dewey Class. No.: </label>025.52  / GUR.T