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Publishers' international ISBN directory plus : CD-ROM ed (1999)
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Publishers' international ISBN directory plus : CD-ROM ed (1996)
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Publishers' international ISBN directory plus : CD-ROM ed (1997)
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Thorn, G. (Red.): Auswahlliste Informationsbestände in Öffentlichen Bibliotheken : Diskettenausgabe / Freitext-Version (1995)
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Zeitschriftendatenbank (ZDB) - CD-ROM : Ausgabe 2/94; Mit Installationsdiskette und einem Handbuch (1994-)
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