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CHNB Zrich von Norden Collection Gugelmann GSGUGESIEGFRIEDA.tif Information Creator Heinrich Siegfried Zrich von Norden Vue gnrale de Zurich prise de la Weid Zrich Aquatinta koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGESIEGFRIEDA helveticarchives ch aspx ID helveticarchives