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Bmam. Scan from Johann Christoph Brotze's book Sammlung verschiedner Lieflndischer Monumente Profil des Falles welchen der von Smerle bis nach der Stadt erneuerte Kanal bey dem Bassin in der Vorstadt macht University of Latvia Academic Library acadlib lv Johann Christoph Brotze PDold Johann Christoph Brotze History of Riga