CHILDE, V Gordon. Operations at Skara Brae during 1929. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 64, p. 158–191, 1930. DOI: 10.9750/PSAS.064.158.191. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7785. Acesso em: 25 apr. 2024.