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ETHBIBTurtmangletscher Weisshorn Matterhorn v. N. aus mInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Turtmangletscher Weisshorn Matterhorn aus Uploaded with GWToolset