MARSHALL, Dorothy N. A square earthwork at Hangingshaw, Yarrow, Selkirkshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 100, p. 109–113, 1969. DOI: 10.9750/PSAS.100.109.113. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8726. Acesso em: 20 apr. 2024.