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CHNB Thusis und Umgebung von Nordosten vorn Sils im Domleschg Collection Gugelmann GSGUGEBLEULERb.tif Information Creator Johann Ludwig Bleuler Thusis und Umgebung von Nordosten vorn Sils im Domleschg Thusis Aquatinta koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEBLEULERb helveticarchives