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Anderson, J.D.: Indexing and classification : file organization and display for information retrieval (1989)
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Hermes, H.-J.; Bischoff, M.: ¬Die Dezimaklassifikation (DK) in Datenbanken (1989)
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König, G.: Online-Retrieval mit der Dezimalklassifikation? (1986)
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Chan, L.M.: Library of Congress class numbers in online catalog searching (1989)
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Oberhauser, O.: Klassifikation in Online-Informationssystemen (1986)
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