Aslib directory of information of information sources in the United Kingdom 

 - 6th ed.  
 - London:   Aslib.   1990 
<br/><br/> Part 1, (Main directory) ; ISBN: 0-85142-222-5 ; 967p.<br/>Part 2, (Subject and abbreviations index) ; ISBN: 0-85142-222-5 ; 266p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science
<br/><br/><label>Subjects--Index Terms: </label>Social science Humanities 
<br/><br/><label>Universal Decimal Class. No.: </label>D 026/027(058.7)(410)  / N0.1