Encyclopeadia of library and information technoloogy and for 21st century Vol. 3 Abstracting practices in libraries 
Editd by Shyama Balakrishnan and P K Paliwal 
 - 1 
 - New Delhi  Anmol Publication  2000 
<br/><br/><label>ISBN: </label>8126106506 
<br/><br/><label>Dewey Class. No.: </label>020.3 SHY/ENC.3