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ETHBIBSihltal Glrnisch TdiInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Sihltal Glrnisch Tdi Uploaded with GWToolset ETHBIBSihltal Glrnisch TdiInlandflgeLBSMH epics ethz