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Zillmann, H.: RSWK im Dienstleistungsspektrum des Bibliotheksrechenzentrums für Niedersachsen (BRZN) (1987)
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Zillmann, H.: PICA als integriertes Verbundsystem (1991)
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Zillmann, H.: ¬Das niederländische PICA-System : Stand: Mai 1990 (1990)
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Schulz, U.: Was wir über OPAC-Nutzer wissen : fehlertolerante Suchprozesse in OPACs (1994)
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