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Description of the coal flora of the Carboniferous formation in Pennsylvania and throughout the United States Plate XLVII . Second Geol Sior PeimsA'lvanicS Lesquereiix Al Rkkly iel Report of Pi'o ress Coul Flora of PI LVI aiic Haft State ftinlei Plate XLVII Illustration biodiversitylibrary org Geological Survey of Pennsylvania