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IBZ-CD-ROM: Internationale Bibliographie der Zeitschriftenliteratur aus allen Gebieten des Wissens : CD-ROM (1994)
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Periodicals contents index on CD-ROM : PCI (1994)
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- Rez. in: IfB 3(1995) H.1, S.41-44 (B. Hoffmann)
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Kosmos Weltatlas 2000 : Der Kompass für das 21. Jahrhundert. Inklusive Welt-Routenplaner (1999)
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IBR-CD-ROM: Internationale Bibliographie der Rezensionen wissenschaftlicher Literatur : wissenschaftliche Monographien; wissenschaftliche Rezensionen; Monographien-Datenbank; CD-ROM (1995)
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- Rez. in: IfB 4(1996) H.4, S.627-631 (B. Hoffmann)
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IBZ-CD-ROM: Internationale Bibliographie der Zeitschriftenliteratur aus allen Gebieten des Wissens : CD-ROM (1994-)
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IBR-CD-ROM: Internationale Bibliographie der Rezensionen wissenschaftlicher Literatur : wissenschaftliche Monographien; wissenschaftliche Rezensionen; Monographien-Datenbank; CD-ROM (1997)
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Vögel unserer Heimat (1999)
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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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Jahrbuch der Auktionspreise für Bücher, Handschriften und Autographen (JAP) : Computerdatei (1997)
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