BB 1201 at the Taïba phosphate mine.
Hans Krebs
CC BY-SA 4.0
ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Krebs, Hans / Com_L24-0136-0034-0008 / CC BY-SA 4.0 / <a rel="nofollow" class="external free" href="https://doi.org/10.3932/ethz-a-001019213">http://doi.org/10.3932/ethz-a-001019213</a>