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CHNB Landwirtschaft Gerte Collection Gugelmann GSGUGEKNIGF.tif Information Creator Franz Niklaus Knig Landwirtschaft Gerte leerer Heuwagen Bleistiftzeichnung Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEKNIGF helveticarchives ch aspx ID helveticarchives ch Swiss National Library Prints