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Petroleum--Appalachian Mountains.
Remove constraint All Subjects: Petroleum--Appalachian Mountains.
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Geology--West Virginia--Boone County.
Remove constraint Subject Topical: Geology--West Virginia--Boone County.
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Geology--West Virginia--Gilmer County.
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Natural gas--West Virginia.
Remove constraint Subject Topical: Natural gas--West Virginia.
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Oil fields--West Virginia.
Remove constraint Subject Topical: Oil fields--West Virginia.
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