Alexander von Humboldt: Biblioteca digital . HiN - Alexander von Humboldt in the Net. International Review for Humboldt Studies, [S. l.], v. 6, n. 11, p. 57–63, 2005. DOI: 10.18443/68. Disponível em: https://www.hin-online.de/index.php/hin/article/view/68. Acesso em: 28 mar. 2026.