Geological survey of Ohio. Part I. Report of progress in 1869, by J.S. Newberry, chief geologist. Part II. Report of progress in the second district, by E.B. Andrews, assist. geologist. Part III. Report on geology of Montgomery county, by Edward Orton, assist. geologist.
- Publication date
- 1871
- Publisher
- Columbus, Nevins & Myers, State Printers,