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Gattermann, G.: Probleme des Online-Benutzerkatalogs : Erfahrungen aus dem OPAC-Projekt der Universitätsbibliothek Düsseldorf (1989)
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Gattermann, G.: Kann der Online-Benutzerkatalog unser Katalogproblem lösen? : Erfahrungen aus dem OPAC-Projekt der Universitätsbibliothek Düsseldorf (1990)
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Gattermann, G.: Online public access catalogue (1985)
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Gattermann, G.: Nutzeroberflächen : ausgewählte Probleme bei der Gestaltung von Nutzeroberflächen in Online-Publikumskatalogen für wissenschaftliche Bibliotheken (1994)
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