Universal decimal classification 
/ British Standard Institution 
 - London:   British Standard Institution,   1981 
 - 30p. 
<br/><br/> BS 1000[633/635] : 1981 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science
<br/><br/><label>Subjects--Index Terms: </label>Classification Standards 
<br/><br/><label>Universal Decimal Class. No.: </label>D 025.45  / M1