Kent, Allen <br/><br/>
Encyclopedia of Library and Information science, Vol.56, Supplement-19 

 - New York  Marcel Dekker, INC.  1995 
 - 367p.  24 cm. 
<br/><br/><label>ISBN: </label>0824720563 
<br/><br/><label>Dewey Class. No.: </label>020.3  / ENC