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Krestel, H.: Informationen aus der Patentdokumentation : unverzichtbare Grundlagen für die Entwicklung und Strategieplanung im Unternehmen (1990) 6.68

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Field: Patentinformation

Jaffe, A.B.; Trajtenberg, M.: Patents, citations and innovations : a window on the knowledge economy (2002) 6.68

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Field: Patentinformation