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Jahrbuch der Auktionspreise für Bücher, Handschriften und Autographen : Ergebnisse der Auktionen in Deutschland, den Niederlanden, Österreich und der Schweiz. Mit einem Anhang: Spezialgebiete der Antiquariate (1992)
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CD-ROMs in print : an international guide to CD-ROMs, CD-I, CDTV & electronic book products (1994)
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Handbuch lieferbarer CD-ROMs : CD-ROM, CD-I, Multimedia (1995)
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¬Der Brockhaus Naturwissenschaft und Technik (2002)
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Schmidt, A.P.: ¬Der Wissensnavigator : Das Lexikon der Zukunft (1999)
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Wikipedia : das Buch : aus der freien Enzyklopädie Wikipedia ; [mit der DVD-ROM Wikipedia 2005/2006] (2005)
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