Rees, Sian E. “A Wooden Ard-Share from Dundarg, Aberdeenshire, With a Note on Other Wooden Plough Pieces”. Proceedings of the Society of Antiquaries of Scotland 113 (November 30, 1984): 457–463. Accessed April 26, 2024. https://journals.socantscot.org/index.php/psas/article/view/9130.