STIRLING, M. Notes: (5) An Upper Quernstone from Perthshire, near Bridge of Allan. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 91, p. 187–188, 1960. DOI: 10.9750/PSAS.091.187.188. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8560. Acesso em: 5 may. 2024.