Narayan Singh, Bhupendran  <br/><br/>
Encyclopaedia of library and information science in the digital age 
/ Bhupendra Narayan Singh 
 - New Delhi  Anmol publications pvt .Ltd  2011 
 - viii ,p296. 
<br/><br/><label>ISBN: </label>978-81-261-4681-9 
<br/><br/><label>Dewey Class. No.: </label>20  / NAR