Universal decimal classification 

 - London  British Standards Institution        1988 
<br/><br/><label>Standard No.: </label>72953 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2:51M96, M8.1-.2