OGSTON, Alexander. The Cairns in Cromar, Aberdeenshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 53, p. 175–179, 1919. DOI: 10.9750/PSAS.053.175.179. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7457. Acesso em: 20 apr. 2024.