GULLEY, J. L. M. The retrospective approach in historical geography. ERDKUNDE, [S. l.], v. 15, n. 4, p. 306–309, 1961. DOI: 10.3112/erdkunde.1961.04.05. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1361. Acesso em: 4 dec. 2024.