AARTOLAHTI, T. On the beach ridges in the area of the Virttaankangas-Säkylänharju esker, SW-Finland. Fennia - International Journal of Geography, [S. l.], v. 117, n. 1, 1972. Disponível em: https://fennia.journal.fi/article/view/9553. Acesso em: 17 may. 2024.