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CHNB Hinterrhein und Quellgebiet des Hinterrheins von Osten Collection Gugelmann GSGUGELUTTRINGHAUSEN.tif Information Hinterrhein und Quellgebiet des Hinterrheins von Osten Hinterrhein Aquarell Bleistiftzeichnung Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGELUTTRINGHAUSEN helveticarchives