Anderson, Joseph. “Notice of a Flint Arrow-Head in the Shaft, Found in a Moss at Fyvie, Aberdeenshire, With Notes in Illustration of the Manufacture of Arrow-Shafts With Flint Tools”. Proceedings of the Society of Antiquaries of Scotland, vol. 11, Nov. 1875, pp. 508-13, doi:10.9750/PSAS.011.508.513.