Barclay, Gordon J, Martha V Andrews, Anne M Blackham, D Gilbertson, Jenny A Lee, Marijke van der Veen, J S Rideout, and Angela Townshend. 1987. “Excavations at Upper Suisgill, Sutherland”. Proceedings of the Society of Antiquaries of Scotland 115 (November):159-98. https://doi.org/10.9750/PSAS.115.159.198.