The Fossil Plants of the Coal Measures of the United States: With Descriptions of the New Species, in the Cabinet of the Pottsville Scientific Associa (Paperback)
Description of Coal Flora of the Carboniferous Formation in Pennsylvania and Throughout the United States: [Additions and Corrections of the First and (Paperback)
Description of Coal Flora of the Carboniferous Formation in Pennsylvania and Throughout the United States: [Additions and Corrections of the First and (Hardcover)
