TROLL, C. Leo Weibel zum Gedächtnis. ERDKUNDE, [S. l.], v. 22, n. 1, p. 63–65, 1968. DOI: 10.3112/erdkunde.1968.01.09. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1548. Acesso em: 4 dec. 2024.