Kent, Allen <br/><br/>
Encyclopedia of Library and Information science, Vol.43, Supplement-8 

 - New York  Marcel Dekker, INC.  1988 
 - 395p.  24 cm. 
<br/><br/><label>ISBN: </label>0824720431 
<br/><br/><label>Dewey Class. No.: </label>020.3  / ENC