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Gattung, B.: ¬Der OPAC der Universitätsbibliothek Düsseldorf : Benutzungsperspektive (1991) 4.54

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Theme: OPAC

Gattung, B.: Datenbank-Aufbau und -Update (1991) 4.54

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Theme: OPAC

Gattung, B.: Zur Analyse des Benutzerverhaltens. T.1 (1991) 4.54

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