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Boeckx, T.: Onderwerpontsluiting in de on-line publiekscatalogus (1986)
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Watanabe, T.: ¬An experimental OPAC system using NDC8 to improve subject access (1994)
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Oberhauser, O.: Implementierung und Parametrisierung klassifikatorischer Recherchekomponenten im OPAC (2005)
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