1.
Wilson D, Stuart J. 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. PSAS [Internet]. 1875 Nov. 30 [cited 2024 Apr. 23];11:266-72. Available from: https://journals.socantscot.org/index.php/psas/article/view/5745