BAKER, A. R. H. A note on the retrogressive and retrospective approaches in historical geography. ERDKUNDE, [S. l.], v. 22, n. 3, p. 244–245, 1968. DOI: 10.3112/erdkunde.1968.03.07. Disponível em: https://www.erdkunde.uni-bonn.de/article/view/1564. Acesso em: 30 apr. 2025.