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ETHBIBLachenInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Lachen Uploaded with GWToolset ETHBIBLachenInlandflgeLBSMH epics ethz ch tif ETHBIB MittelholzerInland flights