CALLANDER, J Graham. Notice of a Harp-shaped Fibula found on the Estate of Polmaise, Stirlingshire, and of Another in the Perth Museum. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 52, p. 26–31, 1918. DOI: 10.9750/PSAS.052.26.31. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7434. Acesso em: 24 apr. 2024.