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ETHBIBPiz Bernina Morteratschgletscher Piz Pal v. N. O. aus mInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Piz Bernina Morteratschgletscher Piz Pal aus Uploaded with GWToolset