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CHNB Montcherand Umgebung Felsgrotte Collection Gugelmann GSGUGEABERLI.tif Information Creator Johann Ludwig Aberli Montcherand Umgebung Felsgrotte Felsgrotte Montcherand Umrissradierung koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEABERLI helveticarchives ch aspx ID helveticarchives