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CHNB Seebergsee auf der Seebergalp ob Zweisimmen Collection Gugelmann GSGUGEWYSSCLC.tif Information Creator Caspar Leontius Wyss Seebergsee auf der Seebergalp ob Zweisimmen Seebergsee Umrissradierung koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEWYSSCLC helveticarchives ch