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ETHBIBGlattenfirn Spannort SchlossberggratInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Glattenfirn Spannort Schlossberggrat Uploaded with GWToolset ETHBIBGlattenfirn Spannort