II.—Geological Survey of Ohio. Report of Progress in 1869, by J. S. Newberry, Chief Geologist; with Reports by E. B. Andrews and Edward Orton, Assistant Geologists. (Columbus, 1871.) - Geological Survey of Ohio. Report of Progress in 1870, by J. S. Newberry and Assistants. (Columbus, 1871.)
G. A. L.
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