Millar, Adam H. “Notes on the Ancient Burgh Seal of Crail, and the Seal of the Chapter of the Abbey of Coupar”. Proceedings of the Society of Antiquaries of Scotland 37 (November 30, 1903): 160–165. Accessed April 20, 2024. https://journals.socantscot.org/index.php/psas/article/view/6870.