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Niggemann, E.; Reinhardt, W.: 1000 Zeitschriften im Volltext elektronisch verfügbar : NRW-Bibliotheken und Elsevier: ein Konsortialvertrag (1997)
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Niggemann, E.: RSWK oder was sonst? Sacherschließung für den Online-Publikumskatalog der Universitätsbibliothek Düsseldorf - ein Werkstattbericht (1991)
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Niggemann, E.: Tanz um den Katalog : Online-Kataloge zwischen Benutzerfreundlichkeit und Regeltreue (1994)
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