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The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries an...
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Annual Report on the Geological Survey of Pennsylvania
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Annual Report on the Geological Survey of Pennsylvania
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Annual Report on the Geological Survey of Pennsylvania
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Annual Report on the Geological Survey of Pennsylvania
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The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries an...
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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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The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries an...
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The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries an...
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Geology of Pennsylvania : A Government Survey: with a General View of the Geology of the Uni...
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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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Edinburgh New Philosophical Journal : Exhibiting a View of the Progressive Discoveries and I...
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Edinburgh New Philosophical Journal : Exhibiting a View of the Progressive Discoveries and I...
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Edinburgh New Philosophical Journal : Exhibiting a View of the Progressive Discoveries and I...
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Description of the Geology of the State of New Jersey: Being a Final Report - Primary Source...
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Geology of Pennsylvani : A Government Survey
by Pennsylvania. Bureau Of Top...
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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
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Annual Report on the Geological Survey of Pennsylvania
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Reports on the Combustible Qualities of the Semi-Anthracites of the Zerbes's Run Coal Fields...
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The Geology of Chester CountyAfter the Surveys of Henry D. Rogers, Persifor Frazer
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The Geology of Pennsylvania, Vol. 1 of 2: A Government Survey (Classic Reprint)
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