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Start Over Year 1980 Place Pennsylvania

21. Second-Degree-Surface Residual-Height Map, Columbus/Marion OH

Maps The Ohio State University Public content
1980. Struble, Richard A. Title assigned by cataloguer. prepared ... by Richard A. Struble and David A. Hodges. "Areal density of photo linears occurring within a 5000 meter... Ohio. Division of Geological Survey.

22. Second-Degree-Surface Residual-Height Map, Toledo OH

Maps The Ohio State University Public content
1980. Struble, Richard A. Title assigned by cataloguer. prepared ... by Richard A. Struble and David A. Hodges. "Areal density of photo linears occurring within a 5000 meter... Ohio. Division of Geological Survey.