ROSS, Donald. Notes on the Contents of Shell-Heaps recently exposed in the Island of Coll. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 15, p. 152–153, 1881. DOI: 10.9750/PSAS.015.152.153. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5960. Acesso em: 28 apr. 2024.