Armit, Ian, Steve Dockrill, Tim Neighbour, Jim Pocock, Ian Simpson, and Martin Wilson. “Archaeological Survey of the Bhaltos (Valtos) Peninsula, Lewis”. Proceedings of the Society of Antiquaries of Scotland 124 (November 30, 1995): 67–93. Accessed April 20, 2024. https://journals.socantscot.org/index.php/psas/article/view/9487.