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Author
Clapp, Frederick G. (Frederick Gardner), 1879-1944. (1)
Subject
Carboniferous - Greene formation; Washington formation; Monongahela formation; Conemaugh formation (1)
Geology -- Pennsylvania -- Greene County -- Maps (1)Geology -- Pennsylvania -- Washington County -- Maps (1)Geology -- United States --Maps (1)
Neogene - Carmichaels formation (1)
... View MoreDate Issued
1907 (1)
Type
Book (1)
Image (1)
Map (1)Has File(s)Yes (1)