1970. Ohio. Division of Geological Survey. OSU's copy 1 gift of Dale Bertsch. Scale approximately 1:2,200,000 State of Ohio, Department of Natural Resources, Division of Geological Survey. Ohio. Division of Geological Survey.
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1999. Ohio. Division of Geological Survey. Scale 1:500,000 ; Lambert conformal conic projection, standard parallels 33⁰ and 45⁰ Includes text and 2 key maps showing compilation responsibilit... Ohio. Division of Geological Survey.
1993. Forsyth, Jane L. 1921-. compiled by Jane L. Forsyth, C. Scott Brockman, and Richard P. Goldthwait. Depths shown by bathymetric isolines. Includes legend, text, location ma... Ohio. Division of Geological Survey.
1993. Hull, Dennis N. Includes legend, text, location maps and primary data source maps. compiled by Dennis N. Hull. Scale 1:250,000 Depths shown by bathymetric isolines. Ohio. Division of Geological Survey.
1993. Goldthwait, Richard P. 1911-1992. Includes legend, text, location maps and primary data source maps. compiled by Richard P. Goldthwait and Robert G. Van Horn. Scale 1:250,000 Depths... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Base map: USGS Cleveland, Ohio; Pa., U.S., Ont., Can. (4th ed. 1972 rev.) "Areal density of photo linears occurring within a 5000 meter square grid... Ohio. Division of Geological Survey.
1980. Struble, Richard A. Base map: USGS Cleveland, Ohio; Pa., U.S., Ont., Can. (4th ed. 1972 rev.) "Areal density of photo linears occurring within a 5000 meter square grid... Ohio. Division of Geological Survey.
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.
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.
50. Regional bedrock geology of the Ohio portion of the Piqua, Ohio-Indiana 30 x 60 minute quadrangle
1993. Schumacher, Gregory A. Includes bibliographical references. Adhesive "Revision" label affixed at end of bibliography. by Gregory A. Schumacher ; Lisa Van Doren and Michae... Ohio. Division of Geological Survey.