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ETHBIBFlugzeug ber Thunersee mit Thun v. S. O. aus mInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Flugzeug ber Thunersee mit Thun aus Uploaded with GWToolset ETHBIBFlugzeug