LEHMANN, H. Herbert Louis. ERDKUNDE, [S. l.], v. 19, n. 1, p. 2–6, 1965. DOI: 10.3112/erdkunde.1965.01.01. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1454. Acesso em: 3 dec. 2024.