ANDERSON, Joseph. Notice of a Fragment of a Silver Penannular Brooch, ornamented with Gold Filigree Work and Amber Settings, found at Achavrole, Dunbeath, Caithness, in 1860: and of two Silver Brooches, the property of Andrew Heiton, F.S.A. Scot., said to have been found in the neighbourhood of Perth. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 14, p. 445–452, 1880. DOI: 10.9750/PSAS.014.445.452. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5939. Acesso em: 19 apr. 2024.