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Reports on the Combustible Qualities of the Semi-Anthracites of the Zerbes's Run Coal Fields...
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Edinburgh New Philosophical Journal : Exhibiting a View of the Progressive Discoveries and I...
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Annual Report on the Geological Survey of Pennsylvania, Volumes 1-4
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Description of the Geology of the State of New Jersey : Being a Final Report
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Geology of Chester County : After the Surveys of Henry D. Rogers, Persifor Frazer, and Charl...
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Description of the Geology of the State of New Jersey : Being a Final Report
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Geology of Pennsylvania : A Government Survey: with a General View of the Geology of the Uni...
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The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries an...
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Reports on the Combustible Qualities of the Semi-Anthracites of the Zerbes's Run Coal Fields...
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Geology of Pennsylvania; a Government Survey : With a General View of the Geology of the Uni...
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Description of the Geology of the State of New Jersey : Being a Final Report
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Geology of Pennsylvania, Vol. 1 Of 2 : A Government Survey (Classic Reprint)
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Second Annual Report on the Geological Exploration of the State of Pennsylvania : Read in Ho...
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