CALDER, Charles S T; HENSHALL, Audrey S. Excavations in Whalsay, Shetland, 1954-55. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 94, p. 28–45, 1963. DOI: 10.9750/PSAS.094.28.45. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8603. Acesso em: 20 apr. 2024.