Universal decimal classification:   Second edition full edition 
/ British Standard Institution 
 - London:   British Standard Institution,   1981 
 - 52p. 
<br/><br/> BS 1000[636/639] : 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 025.45:636/639  / K9;M1-;1