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CHNB Bern Oberland Collection Gugelmann GSGUGEKNIGF.tif Information Bern Oberland Studie eines Fensters in einem Berner Oberlnderhaus Bern Gouachemalerei Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEKNIGF helveticarchives ch aspx ID helveticarchives ch Swiss National Library Prints