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ETHBIBBuchs ZrichInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Buchs Zrich Uploaded with GWToolset ETHBIBBuchs Zrich InlandflgeLBSMH epics ethz ch tif ETHBIB MittelholzerInland