Aerial photograph of the Debag plant at Zürich main station.
Comet Photo AG (Zürich)
CC BY-SA 4.0
ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Comet Photo AG (Zürich) / Com_FC24-8004-0044 / CC BY-SA 4.0 / <a rel="nofollow" class="external free" href="https://doi.org/10.3932/ethz-a-000036722">http://doi.org/10.3932/ethz-a-000036722</a>