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Höfig, W.; Ubbens, W.: Zeitungen in Bibliotheken : Aufsätze, Monographien und Rezensionen des Jahres ... (1982-)
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Belkin, N.J.; Croft, W.B.: Retrieval techniques (1987)
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- Annual review of information science and technology. 22(1987), S.109-145
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Smith, L.C.: Artificial intelligence and information retrieval (1987)
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Warner, A.J.: Natural language processing (1987)
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