BECK, H. Zu geographiegeschichtlichen Dissertationen 1961-1972. ERDKUNDE, [S. l.], v. 28, n. 2, p. 125–129, 1974. DOI: 10.3112/erdkunde.1974.02.04. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1716. Acesso em: 8 oct. 2024.