WILSON, Daniel; STUART, John. Notices of Sculptured Rocks and Boulders recently observed in Ohio and Kentucky, United States of America, and of the Probable Origin of the Cup-Markings which occur on Stones there and in other Countries. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 11, p. 266–272, 1875. DOI: 10.9750/PSAS.011.266.272. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5745. Acesso em: 26 apr. 2024.