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CHNB Hombrechtikon von Westen Collection Gugelmann GSGUGEMEYERJJB.tif Information Hombrechtikon von Westen Hombrechtikon Hombrechtikon Bleistiftzeichnung Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEMEYERJJB helveticarchives ch aspx ID helveticarchives ch Swiss National Library Prints