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Prasher, R.G.: Index and indexing (1990)
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Hancock-Beaulieu, M.: ¬A comparative transaction log analysis of browsing and search formulation in online catalogues (1993)
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Smith, S.E.: On the shoulders of giants : from Boole to Shannon to Taube: the origins and development of computerized information from the mid-19th century to the present (1993)
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Kilgour, F.G.: Origins of coordinate searching (1997)
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Gödert, W.: Verbale Inhaltserschließung : Ein Übersichtsartikel als kommentierter Literaturbericht (1991)
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