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CHNB Rosenlauigletscher mit Well und Wetterhorn Collection Gugelmann GSGUGELAMYC.tif author Rosenlauigletscher mit Well und Wetterhorn Rosenlauigletscher Aquatinta koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGELAMYC helveticarchives ch aspx ID helveticarchives ch Swiss National