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Emminger Ravensburg von Nordosten c. Ravensburg von Nordosten Alfons Dreher Geschichte der Reichsstadt Ravensburg Band ISBN Creator Eberhard Emminger PDold Eberhard Emminger History of Ravensburg Wehrturm am Gnsbhl Ravensburg Stadtmauer Ravensburg Schellenberger Turm Ravensburg