Filing and indexing  
/ Learning systems limited 
 - London:  Pitman Publishing,  1971 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science
<br/><br/><label>Subjects--Index Terms: </label>Indexing 
<br/><br/><label>Universal Decimal Class. No.: </label>D 651.5+651.8(023)  / L1