STEER, Kenneth A. The Roman Fort at Easter Happrew, Peeblesshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 90, p. 93–101, 1959. DOI: 10.9750/PSAS.090.93.101. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8521. Acesso em: 3 may. 2024.