Martin, W., & Rotherham, E. C. (1896). Rude Bone Pins of large size made from Red-deer Horn, obtained from the Cairns of County Sligo, and Lough Crew, County Meath: With Illustrations and Remarks. Proceedings of the Society of Antiquaries of Scotland, 30, 340–345. https://doi.org/10.9750/PSAS.030.340.345