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CHNB Thun Umgebung Schadau Collection Gugelmann GSGUGEABERLIF.tif Information Thun Umgebung Schadau Thun Aquarell Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEABERLIF helveticarchives ch aspx ID helveticarchives ch Swiss National Library Prints and Drawings Department Uploaded with