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Unesco thesaurus : a structured list of descriptors for indexing and retrieving literature in the fields of education, science, social and human science, culture and communication and information (1995)
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Fugmann, R.: ¬An interactive classaurus on the PC (1990)
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Negrini, G.: CLASTHES: a thesaurofacet generator (1994)
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Himanka, J.; Kautto, V.: Translation of the Finnish abridged edition of UDC into general Finnish subject headings (1992)
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