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CHNB Bielersee sdstliches Ufer Blick gegen die Petersinsel Collection Gugelmann GSGUGEABERLIA.tif Information Creator Johann Ludwig Aberli Bielersee sdstliches Ufer Blick gegen die Petersinsel Vue prise aux environs du Lac de Bienne Bielersee Aquarell Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library