Coles, Frederick R. “Report on Stone Circles of the North-East of Scotland - the Buchan District - With Measured Plans and Drawings, Obtained under the Gunning Fellowship”. Proceedings of the Society of Antiquaries of Scotland 38 (November 30, 1904): 256–305. Accessed May 10, 2024. https://journals.socantscot.org/index.php/psas/article/view/6978.