BRYCE, Thomas H. On the Bones from Graves at Ackergill, Caithness, and an Underground Building at Rennibister, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 61, p. 301–317, 1927. DOI: 10.9750/PSAS.061.301.317. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7711. Acesso em: 5 may. 2024.