SPREITZER, H. Die Piedmonttreppen in der regionalen Geomorphologie. ERDKUNDE, [S. l.], v. 5, n. 4, p. 294–305, 1951. DOI: 10.3112/erdkunde.1951.04.03. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1011. Acesso em: 7 oct. 2024.