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Kaiser, A.: Zeitbezogene Datenbanksysteme : eine Bestandsaufnahme und ausgewählte Problemstellungen (1996)
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Hagler, R.; Simmons, P.: ¬The bibliographic record and information technology (1982)
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Gabriel, R.; Röhrs, H.-P.: Datenbanksysteme : Konzeptionelle Datenmodellierung und Datenbankstrukturen (1995)
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