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ETHBIBZrich bersichtInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie SilbergelatineAbzug object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Zrich bersicht Uploaded with GWToolset ETHBIBZrich bersichtInlandflgeLBSMH epics ethz ch tif ETHBIB