GUTTMANN, E B A; DOCKRILL, S J; SIMPSON, I A. Arable agriculture in prehistory: new evidence from soils in the Northern Isles. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 134, p. 53–64, 2005. DOI: 10.9750/PSAS.134.53.64. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9599. Acesso em: 19 apr. 2024.