Troll, Carl, Josef van Eimern, and W. Daume. “Herman Sörgels „Atlantropa“ in Geographischer Sicht”. ERDKUNDE 4, no. 3/4 (November 30, 1950): 177–188. Accessed December 2, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/964.