CALLANDER, J Graham. Long Cairns and other Prehistoric Monuments in Aberdeenshire and Banffshire, and a Short cist at Bruceton, Alyth, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 59, p. 21–28, 1925. DOI: 10.9750/PSAS.059.21.28. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7627. Acesso em: 8 oct. 2024.