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CHNB Utrecht am AmsterdamRijn Collection Gugelmann GSGUGEBLEULERb.tif Information Creator Johann Ludwig Bleuler Utrecht am AmsterdamRijn Utrecht Aquatinta koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEBLEULERb helveticarchives ch aspx ID helveticarchives ch Swiss National