This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
ETHBIBWasserflugzeug ber Kerenzerberg Walensee Churfirstenkette BndneralpenInlandflgeLBS MH.tif cm exhibition history Institution ETHBibliothek Fotografie Glasplattennegativ object history PDoldauto Creator Walter Mittelholzer EPics Bildarchiv online org Template ETHBibliothek Wasserflugzeug ber Kerenzerberg Walensee Churfirstenkette