Dewey , Melvil  . <br/><br/>
Dewey decimal classification and relative index /  
Melvil Dewey ; edited by Joan S. Mitchell... et al. . 
 - 21 ed /   . 
 - New York :   Online Computer Library Center ,   1996. 
 - lxix, 625p. :   figures ;   23cm .  
<br/><br/>NULL 
<br/><br/><label>ISBN: </label> NULL (hbk) 
<br/><br/><label>Subjects--Index Terms: </label>CLASSIFICATION, DEWEY DECIMAL  
<br/><br/><label>Dewey Class. No.: </label>025.431  / DEW/D