Frank-Walter Steinmeier FP. Address on the opening Alexander von Humboldt Season in Quito, Ecuador, on 13 February 2019 (With an introduction by Ottmar Ette). Humboldt im Netz [Internet]. 2019 Aug. 6 [cited 2026 May 12];20(38):23-30. Available from: https://www.hin-online.de/index.php/hin/article/view/283