National Geologic Map Database
General Information
- Title: Preface
- Author(s): Lesley, J.P.
- Publishing Organization: Pennsylvania Second Geological Survey (1874-1889)
- Series and Number: Report of Progress F [p. xxv-xxvi]
- Larger Work: Dewees, J.H., Report of progress in the Juniata district on the fossil iron ore beds of middle Pennsylvania
- Publication Date: 1878
- Cross Section: None
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