MCLAREN, Thomas. Ancient Remains at Birnam, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 54, p. 204–210, 1920. DOI: 10.9750/PSAS.054.204.210. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7483. Acesso em: 27 apr. 2024.