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Dambeck, H.; Engler, T.: Gesucht und gefunden : Neun Volltext-Suchprogramme für den Desktop (2002)
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Graham, T.: ¬The free language approach to online catalogues : the user (1985)
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Pritchard-Schoch, T.: Comparing natural language retrieval : Win & Freestyle (1995)
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Reinisch, F.: Wer suchet - der findet? : oder Die Überwindung der sprachlichen Grenzen bei der Suche in Volltextdatenbanken (2000)
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Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989)
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