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Special report on the petroleum of Pennsylvania, its production, transportation, manufacture and statistics.

By Wrigley, Henry E..
Harrisburg, Pub. by the Board of Commissioners for the Second Geological Survey, 1875 .
vii, 122J p. , At head of title: Second Geological Survey of Pennsylvania, 1874. 23 cm..

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A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ...

By Lesley, J. Peter,.
Harrisburg, Board of Commissioners for the Geological Survey, 1889 .
3 v. , At head of title: Geological survey of Pennsylvania. | Paged continuously. 23 cm..

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