Coles, F.R. 1905. Record of (I) the Excavation of two Stone Circles in Kincardineshire: (1) in Garrol Wood, Durris; (2) in Glassel Wood, Banchory-Ternan; and (II) Report on Stone Circles in Aberdeenshire, with measured Plans and Drawings; obtained under the Gunning Fellows. Proceedings of the Society of Antiquaries of Scotland. 39, (Nov. 1905), 190–218. DOI:https://doi.org/10.9750/PSAS.039.190.218.