Coles, Frederick R. “Report on the Stone Circles of the North-East of Scotland, Inverurie District, Obtained under the Gunning Fellowship, With Measured Plans and Drawings”. Proceedings of the Society of Antiquaries of Scotland 35 (November 30, 1901): 187–248. Accessed April 26, 2024. https://journals.socantscot.org/index.php/psas/article/view/6806.