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Mason & Chaplin |
1979 |
Nancy and Cowbell Members of the Borden Formation. In: Ettersohn,F.R. & Dever,G.R., Carboniferous geology from the Appalachian Basin to the Illinois Basin through Eastern Ohio and Kentucky.
Ninth International Congress of Carboniferous Stratigraphy and Geology, Field Trip No.4, Guidebook.
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