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CHNB Zrich von Norden Collection Gugelmann GSGUGEBIEDERMANNA.tif Information Creator Johann Jakob Biedermann Zrich von Norden Zrich Umrissradierung File CHNB Zrich von Norden Collection Gugelmann GSGUGEBIEDERMANNB tif Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEBIEDERMANNA Swiss National