Evocación del barón Alexander von Humboldt. X (41): xli-xliv, 1959. Rev. Acad. Colomb. Cienc. Ex. Fis. Nat. [Internet]. 2019 Sep. 25 [cited 2025 Mar. 9];43(168):439-42. Available from: https://raccefyn.co/index.php/raccefyn/article/view/1006