GRAHAM, Angus. Notes on some Brochs and Forts visited in 1949. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 83, p. 12–24, 1951. DOI: 10.9750/PSAS.083.12.24. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8327. Acesso em: 20 apr. 2024.