Federal President Frank-Walter Steinmeier at the opening of the Alexander von Humboldt Season in Quito, Ecuador, on 13 February 2019. Humboldt im Netz [Internet]. 2019 Aug. 6 [cited 2026 Mar. 28];20(38):15-22. Available from: https://hin-online.de/index.php/hin/article/view/282