Hansen, Michael C.Includes text and ill.by Michael Hansen."Publication date: 9/98."Revised edition 1997.Scale approximately 1:2,100,000.Text, insets and ill. on verso.TIFFhttps://hdl.handle.net/1811/6a167b42-a0eb-4a37-b2e2-76d77efb4a5fengOhio. Division of Geological SurveyPublicGeologyGeology, StratigraphicThe ice age in OhioMapsOhioThe Ohio State University