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://www.erdkunde.uni-bonn.de/article/view/933. Acesso em: 30 apr. 2025.