RALSTON, Ian. Ian Alexander George Shepherd. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 139, p. 1–8, 2010. DOI: 10.9750/PSAS.139.1.8. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9744. Acesso em: 24 apr. 2024.