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Schopen, M.: GRIPS-Menu : Unterstützung von Endnutzerrecherchen in Literaturdatenbanken des DIMDI (1994)
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Schopen, M.: Cross file searching of biomedical databases at DIMDI (1990)
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Schopen, M.: Strukturierte Suchen mit GRIPS-Menu in den Datenbanken des Deutschen Instituts für medizinische Dokumentation und Information, DIMDI (1992)
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