Não informado. (2022). Report of the Geological Survey of Ohio. Geological Survey of Ohio.
Lua i Stíl Chicago (17ú heag.)Não informado. Report of the Geological Survey of Ohio. Columbus, Ohio: Geological Survey of Ohio, 2022.
Lua MLA (8ú heag.)Não informado. Report of the Geological Survey of Ohio. Geological Survey of Ohio, 2022.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.