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Geiß, D.: Neues aus der Patentinformation (1999) 0.01

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Geiß, D.: Recherchetechniken in Patentinformationsnetzen, dargestellt am Beispiel des CD-ROM Kommunikationsnetzes des Informationszentrums Technik und Patente der Universitätsbibliothek Dortmund (1996) 0.01

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