JÄGER, H. Reduktive und progressive Methoden in der Deutschen Geographie. ERDKUNDE, [S. l.], v. 22, n. 3, p. 245–246, 1968. DOI: 10.3112/erdkunde.1968.03.08. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1565. Acesso em: 8 oct. 2024.