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ETHBIBArosa Parpaner Weisshorn Gugernell Mdrigerfluh 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 Arosa Parpaner Weisshorn Gugernell Mdrigerfluh aus Uploaded