Não informado. (2022). Report of the Geological Survey of Ohio. Geological Survey of Ohio.
Citace podle Chicago (17th ed.)Não informado. Report of the Geological Survey of Ohio. Columbus, Ohio: Geological Survey of Ohio, 2022.
Citace podle MLA (8th ed.)Não informado. Report of the Geological Survey of Ohio. Geological Survey of Ohio, 2022.
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