GRAEME, A Sutherland. An Account of the Excavation of the Broch of Ayre, St Mary’s Holm, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 48, p. 31–51, 1914. DOI: 10.9750/PSAS.048.31.51. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7341. Acesso em: 5 may. 2024.