Curle, J. and Tagg, H.F. 1925. Note on a Primitive Weapon or Tool, fashioned by fixing a Stone in a Wooden Shaft, found in a Moss at Bogancloch, Parish of Rhynie, Aberdeenshire: With a Report on wood of the haft. Proceedings of the Society of Antiquaries of Scotland. 59, (Nov. 1925), 18–20. DOI:https://doi.org/10.9750/PSAS.059.18.20.