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Frschengraben Burri. Der Frschengraben mit Wollishofertor auf einem Stich von Johann Ulrich Burri Zentralbibliothek Zrich upload Mai Burri upload by Adrian Michael PDold Historical images of Frschengraben Zrich Graphische Sammlung der Zentralbibliothek Zrich Johann Ulrich Burri
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