DI FOLCO, John. Roof tile fragments from the Isle of May. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 111, p. 523–524, 1982. DOI: 10.9750/PSAS.111.523.524. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9074. Acesso em: 24 jun. 2024.