CALDWELL, David H. Lead seal matrices of the 16th and early 17th century. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 123, p. 373–380, 1994. DOI: 10.9750/PSAS.123.373.380. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9476. Acesso em: 20 apr. 2024.