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classification_ss:"AN 95000 Allgemeines / Buch- und Bibliothekswesen, Informationswissenschaft / Informationswissenschaft / Informationspraxis / Bibliographische Erfassung, Suchpraxis"
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subject_ss:"Datenverarbeitung / Information Retrieval"
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theme_ss:"Grundlagen u. Einführungen: Allgemeine Literatur"
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Rijsbergen, C.J. van: Information retrieval (1979)
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