MANSHARD, W. Entwicklungspläne in der Gambia. ERDKUNDE, [S. l.], v. 9, n. 3, p. 220–224, 1955. DOI: 10.3112/erdkunde.1955.03.06. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1145. Acesso em: 3 dec. 2024.