UNESCO thesaurus:   A structured list of descriptors for indexing and retrieving literature in the fields of education, science, social science, culture and communication 
/ UNESCO 
 - Paris:   UNESCO,   1977 
 - xvii, 485p. 
<br/><br/> Vol. 1  (Introduction classified thesaurus permuted index hierarchical display); ISBN: 9231014692; xvii, 485p.<br/>Vol. 2 (Alphabetical thesaurus); ISBN: 9231014692; 530p. 
<br/><br/><label>ISBN: </label>9231014692 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science
<br/><br/><label>Universal Decimal Class. No.: </label>D 025.45  / L7.1