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Krause, J.; Womser-Hacker, C.: PADOK-II : Retrievaltests zur Bewertung von Volltextindexierungsvarianten für das deutsche Patentinformationssystem (1990)
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Geiß, D.: Entwurf für ein deutsches Patentinformationssystem : eine Zwischenbilanz (1988)
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Hartung, V.: ¬Das Patentinformationssystem PATIS des Deutschen Patentamtes (1995)
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Krause, J.: Zur Wahl der Texterschließungskomponente für ein deutsches Patentinformationssystem : Kontroverses zur Bilanz von D. Geiß 'Entwurf für ein deutsche Patentinformationssystem' in den NfD 5/1988 (1989)
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Ester, M.: Digital image collections : issues and practice (1997)
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