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CHNB Breithorngletscher gegen das Lauterbrunnental Collection Gugelmann GSGUGEWOLF.tif Information Breithorngletscher gegen das Lauterbrunnental Breithorngletscher File CHNB Breithorngletscher gegen das Lauterbrunnental Collection Gugelmann GSGUGEWOLF tif Swiss National Library CHNBCollection Gugelmann PDold User Swiss National