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Bertelmann, R.; Rusch-Feja, D.: Informationsretrieval im Internet : Surfen, Browsen, Suchen - mit einem Überblick über strukturierte Informationsangebote (1997)
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Bertelmann, R.; Braune, S.: ¬Ein Mapserver zur Suche im Kartenbestand (2003)
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Bertelmann, R.; Höhnow, T.; Volz, S.: Bibliothekssuchmaschine statt Bibliothekskatalog (2007)
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