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ETHBIBNiederusterInlandflgeLBS MH.tif Album cm exhibition history Institution ETHBibliothek Reprofotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Niederuster Uploaded with GWToolset ETHBIBNiederusterInlandflgeLBSMH epics ethz ch tif ETHBIB