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CHNB Thierachern Blick gegen den Thunersee und die Alpen Collection Gugelmann GSGUGEWOLF.tif Information Creator Friedrich Rosenberg Creator Rudolf Samuel Henzi Thierachern Blick gegen den Thunersee und die Alpen Thierachern Farbkupferstich Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEWOLF