LAING, David. Notice of Two Original Documents Deposited in the Museum by the Trustees of the late Miss Agnes Black, Perth. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 12, p. 63–64, 1877. DOI: 10.9750/PSAS.012.63.64. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5796. Acesso em: 19 apr. 2024.