CLOUT, H. D. The Increase in the Grassland Area of the Pays de Bray. ERDKUNDE, [S. l.], v. 23, n. 1, p. 20–29, 1969. DOI: 10.3112/erdkunde.1969.01.03. Disponível em: https://www.erdkunde.uni-bonn.de/article/view/1575. Acesso em: 30 apr. 2025.