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ETHBIBZrich Stauffacher Sihlquai WerdInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Zrich Stauffacher Sihlquai Werd Uploaded with GWToolset ETHBIBZrich Stauffacher Sihlquai