Floras of the Pocono formation and Price sandstone in parts of Pennsylvania, Maryland, West Virginia, and Virginia, including descriptions of 22 new species, 1 new genus, and 4 new combinations of Mississippian age. - Read, C. B. (Washington, U.S.Govt.Print.Off., 1955)
"Literature cited" : p.29-30.
Keywords: Paleobotany -- Mississippian; Paleobotany -- United States