Kent, Allen <br/><br/>
Encyclopedia of Library and Information science, Vol.52, Supplement-15 

 - New York  Marcel Dekker  1993 
 - 376p.  24 cm. 
<br/><br/><label>ISBN: </label>0824720520 
<br/><br/><label>Dewey Class. No.: </label>020.3  / ENC