MUNRO, Robert; GILLESPIE, Patrick. Further Notes on Ancient Wooden Traps – the so-called Otter and Beaver Traps. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 53, p. 162–167, 1919. DOI: 10.9750/PSAS.053.162.167. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7463. Acesso em: 19 apr. 2024.