Fication Ed. <br/><br/>
Uinversal decimal classification. 

 - 3 
 - London  British Standards House       1961 
 - 254p.  cm. 
<br/><br/><label>Standard No.: </label>120331 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>2:51NO5, K1