Martin, Wood, and E C Rotherham. “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 (November 30, 1896): 340–345. Accessed April 25, 2024. https://journals.socantscot.org/index.php/psas/article/view/6632.