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CHNB Thun Teilansicht vom Schloss gegen den See Collection Gugelmann GSGUGEWOCHERMFDA.tif Information Thun Teilansicht vom Schloss gegen den See Thun Umrissradierung koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEWOCHERMFDA helveticarchives ch aspx ID helveticarchives ch Swiss