Puig-Samper M Ángel, Rebok S. Charles Darwin and Alexander von Humboldt: An exchange of looks between two famous naturalists. Humboldt im Netz [Internet]. 2010 Apr. 21 [cited 2026 May 26];11(21):55-64. Available from: https://hin-online.de/index.php/hin/article/view/145