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ETHBIBStockberg Toggenburg WokenmeerInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Stockberg Toggenburg Wokenmeer Uploaded with GWToolset ETHBIBStockberg Toggenburg WokenmeerInlandflgeLBSMH