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- Title
- Historical sketch of geological explorations in Pennsylvania and other states, by J. P. Leslley. With an appendix containing the annual reports of the state geologist to the board of commissioners.
- Author
- Lesley, J. P. (J. Peter), 1819-1903.
- Publication info
- Harrisburg, Pub. by the Board of commissioners for the Second geological survey,
- 1876.