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Dost, C.: ¬Der Informationsdienst im System der Stadtbibliotheken Duisburg und Köln : eine vergleichende Untersuchung der Konzeptionen und der Informationsbestände (1985)
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Veyssière, C.: ¬Die Klassifikationen der Stadtbibliotheken Bochum und Duisburg : eine vergleichende Untersuchung zweier ASB-Varianten (1983)
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Stürmer, U.: Vergleichende Evaluierung verschiedener Interaktionsparadigmen für Information Retrieval (1995)
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Gretz, M.; Thomas, M.: Indexierungen in biomedizinischen Literaturdatenbanken : eine vergleichende Analyse (1991)
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Ruppert, E.: Grundlagen des Auskunftsdienstes in Stadtbibliotheken (1985)
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