Alkire, Robert L. 1910-Includes index to oil and gas fields.Includes: Generalized section of rocks of Ohio.Scale [1:380,160]compiled by Robert L. Alkire ; drafting by Harold J. Flint ; base map by W.D. Turnbull.TIFFhttps://hdl.handle.net/1811/f07ffee5-1786-421f-975a-f6dd3002d5acengOhio. Division of Geological SurveyPublicPetroleumNatural gasOil and gas fields of OhioMapsOhioThe Ohio State University