DUNS, Professor. On Stone Implements from Shetland (Specimens Exhibited). Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 15, p. 241–246, 1881. DOI: 10.9750/PSAS.015.241.246. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5969. Acesso em: 21 may. 2024.