BEHRMANN, W. Gesellschaften und Institute. ERDKUNDE, [S. l.], v. 3, n. 2/3, p. 177–179, 1949. DOI: 10.3112/erdkunde.1949.02.16. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/933. Acesso em: 3 mar. 2025.