Universal decimal classification  : auxiliary signs and subdivision 

 - 2nd ed. 
 - Park Street  ; British Standards Institution  , 1974 
<br/><br/><label>ISBN: </label>058008373X  110 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification Systems<br/>Library Science<br/>Universal Decimal Classification
<br/><br/><label>Dewey Class. No.: </label>025.432  / UNI