RIKKINEN, K. Ragnar Hult and the emergence of geography in Finland, 1880-1900. Fennia - International Journal of Geography, [S. l.], v. 166, n. 1, p. 3–192, 1988. Disponível em: https://fennia.journal.fi/article/view/9036. Acesso em: 15 may. 2024.