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  1. Deutsche Nationalbibliographie : CD-ROM-Ausgabe (1992-) 0.05 
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    Footnote
    Ursprünglich: Deutsche Bibliographie: CD-ROM-Ausgabe. -Rez. in: IfB 2(1994) H.3/4, S.486-490 (B. Hoffmann). - Vgl. auch die einleitenden Bemerkungen von K. Schreiber sowie die Darstellung über die laufenden Nationalbibliographien in Deutschland in IfB 1(1993) H.3/4, S.159-200
  2. Brinkman's cumulative catalogue on CD-ROM (1996-) 0.02 
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    Date
    16. 2.1997 16:22:51
  3. Deutsche Nationalbibliographie : CD-ROM 1972-1985 (1997) 0.01 
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    Date
    7. 5.2000 10:38:22

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