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Bmam. Scan from Johann Christoph Brotze's book Sammlung verschiedner Lieflndischer Monumente Prospect der im Lindenhofschen Gebiet Werst von Riga befindlichen Grotte mit Eingngen von den Bauern Welnu Zeppils genannt Anno Gra die Ansicht University of Latvia Academic Library acadlib lv Johann Christoph Brotze PDold Johann Christoph