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 Q [p. xix, 305-308]
- Larger Work: White, I.C., Report of progress in the Beaver River district of the bituminous coal fields of western Pennsylvania, with analyses of coal, cannel, coke, clay, limestone, and ore, from Butler and Beaver Counties, Pennsylvania by A.S. McCreath
- Publication Date: 1878
- Cross Section: None
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