Kent, Allen <br/><br/>
Encyclopedia of Library and Information science, Vol.51, Supplement-14 

 - New York  Marcel Dekker, INC.  1993 
 - 407p.  24 cm. 
<br/><br/><label>ISBN: </label>0824720512 
<br/><br/><label>Dewey Class. No.: </label>020.3  / ENC