RITCHIE, James. A Keg of ’Bog-Butter’ from Skye and its Contents. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 75, p. 5–22, 1941. DOI: 10.9750/PSAS.075.5.22. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8148. Acesso em: 6 may. 2024.