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ETHBIBBifertenstock Cavistrau Oberalpstock Tdi v. W. aus mInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Bifertenstock Cavistrau Oberalpstock Tdi aus Uploaded with GWToolset