Ritchie, A., Halliday, S., Fernie, E., Macquarrie, A., Martin, C., Wickham-Jones, C., Driscoll, S., Nieke, M. and Cameron, N. 1987. Lecture summaries. Proceedings of the Society of Antiquaries of Scotland. 116, (Nov. 1987), 583-592. DOI:https://doi.org/10.9750/PSAS.116.583.592.