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ETHBIBGraustock Titlis Trbsee Engstlensee Wendenstcke aus mInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Graustock Titlis Trbsee Engstlensee Wendenstcke aus Uploaded with