Prehistoric Man at Tweed Bridge, Selkirk. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 65, p. 414–417, 1931. DOI: 10.9750/PSAS.065.414.417. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/7825. Acesso em: 27 oct. 2025.