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Paper Map
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Geology, Stratigraphic
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Ohio
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1. Bedrock geologic map of Ohio
Slucher, Ernie R. Ohio Dept. of Natural Resources, Division of Geological Survey,.
2. Stratigraphy of the Upper Silurian Salina Group, New York, Pennsylvania, Ohio, Ontario
Rickard, Lawrence V. University of the State of New York, State Education Dept.,.