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Bergwerkbericht. de Titelblatt des zweiten Generalberichtes der Direktion des deutschamerikanischen BergwerkVereins in Elberfeld an die Aktieninhaber Oktober Dr Albrecht Blank author PDold Original upload log page de Bergwerkbericht Albrechtblank bytes no Andere Versionen Mining in Wuppertal Documents of Wuppertal in Wuppertal