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Lehmann, O.; Lehmann, A.: Top-Platzierungen in Suchmaschinen (2002)
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Lehmann, K.: Zu ausgewählten Problemen der neuen Gliederung der Hauptgruppe R Belletristik : Hinweise und Titel (1984)
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Lehmann, K.: ¬Die Klassifikation für Allgemeinbibliotheken (KAB) (1992)
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Atzbach, R.: ¬Der Rechtschreibtrainer : Rechtschreibübungen und -spiele für die 5. bis 9. Klasse (1996)
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¬The new British Library subject system (1990)
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Jaeger, L.: Fake Science (2020)
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Jochum, U.: ¬Der Deutsche Gesamtkatalog (1993)
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Henke, R.: ¬Das Wissen der Welt kommt per Knopfdruck : Geschäft mit dem Zugriff auf Datenbanken boomt (1994)
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