STUART, John. Note of a curious Carved Bone Object found at Fortrie, Ellon, Aberdeenshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 9, p. 547, 1871. DOI: 10.9750/PSAS.009.547.1. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5539. Acesso em: 14 jun. 2024.