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The German economy in the twentieth century
Braun, Hans-Joachim - 1990
Persistent link: https://www.econbiz.de/10008730806
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Patentschutz und Innovation in Geschichte und Gegenwart
Boch, Rudolf (ed.); Braun, Hans-Joachim (contributor) - 1999
Persistent link: https://www.econbiz.de/10000682700