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CHNB Twannbachflle erster Teil Collection Gugelmann GSGUGEDUNKERBAC.tif Information Twannbachflle erster Teil Twannbachflle Umrissradierung koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEDUNKERBAC helveticarchives ch aspx ID helveticarchives ch Swiss National Library Prints