KIRKNESS, William. An Underground Building at Dale, Harray, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 62, p. 155–161, 1928. DOI: 10.9750/PSAS.062.155.161. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7743. Acesso em: 20 apr. 2024.