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CHNB Bern von Norden Collection Gugelmann GSGUGEABERLIC.tif Information Creator Johann Ludwig Aberli Bern von Norden Bern Umrissradierung koloriert File CHNB Bern von Norden Collection Gugelmann GSGUGEABERLIC tif Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEABERLIC helveticarchives