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Author
Stone, Ralph W. (Ralph Walter), 1876-1964. (1)
SubjectCarboniferous - Greene formation; Washington formation; Monongahela formation (1)
Geology -- United States --Maps (1)
Geology--Pennsylvania--Maps (1)
Neogene - Carmichaels formation (1)
... View MoreDate Issued
1905 (1)
Type
Book (1)
Image (1)Map (1)Has File(s)Yes (1)