Small, Alan, M B Cottam, and John G Dunbar. “Souterrain and Later Structures at Northwaterbridge, Kincardineshire”. Proceedings of the Society of Antiquaries of Scotland 105 (November 30, 1975): 293–296. Accessed December 8, 2024. https://journals.socantscot.org/index.php/psas/article/view/8891.