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CHNB Naturstudie Collection Gugelmann GSGUGEKNIGE.tif Information Naturstudie Wiese mit weidendem Vieh die Wiese von hohen Bumen umgeben Radierung Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEKNIGE helveticarchives ch aspx ID helveticarchives ch Swiss National Library Prints and Drawings