MITCHELL, Arthur. On some remarkable Discoveries of Rude Stone Implements in Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 7, p. 118–134, 1867. DOI: 10.9750/PSAS.007.118.134. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5318. Acesso em: 26 apr. 2024.