BECK, H. Die Geschichte der Geographie in Polen. ERDKUNDE, [S. l.], v. 21, n. 3, p. 240–242, 1967. DOI: 10.3112/erdkunde.1967.03.08. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1533. Acesso em: 7 oct. 2024.