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.
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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.
1926. W.W. Hixson & Co. Page from: Plat book of Lenawee County, Michigan Scale approximately 1:51,000. W.W. Hixson & Co.
1929. W.W. Hixson & Co. Page from: Plat book of Hillsdale County, Mich Scale approximately 1:51,000. W.W. Hixson & Co.
1929. W.W. Hixson & Co. Page from: Plat book of Hillsdale County, Michigan Scale approximately 1:51,000. W.W. Hixson & Co.
1927. W.W. Hixson & Co. Page from: Plat book of Kalkaska County, Michigan Scale approximately 1:51,000. W.W. Hixson & Company.
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.
1090. Raw Data Map, Toledo OH
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.