02154oam 2200637 450 991070627120332120171006102823.0(CKB)5470000002455723(OCoLC)891598898(OCoLC)995470000002455723(EXLCZ)99547000000245572320140929d1954 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierTwo new plant genera of Pennsylvanian age from Kansas coal balls /by Sergius H. MamayWashington :United States Department of the Interior, Geological Survey,1954.1 online resource (19 unnumbered pages, 3 unnumbered pages of plates) illustrationsGeological Survey professional paper ;254-DShorter contributions to general geologyTitle from title screen (viewed September 29, 2014)."Descriptions and illustrations of Tyliosperma and Sclerocelyphus fructifications."Includes bibliographical references (page 95) and index.PaleobotanyPennsylvanianPaleobotanyKansasPlant spores, FossilSeeds, FossilCoal ballsKansasPaleobotanyfastPennsylvanian Geologic PeriodfastPlant spores, FossilfastSeeds, FossilfastKansasfastPaleobotanyPaleobotanyPlant spores, Fossil.Seeds, Fossil.Coal ballsPaleobotany.Pennsylvanian Geologic Period.Plant spores, Fossil.Seeds, Fossil.Mamay Sergius H.1920-1386004Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910706271203321Two new plant genera of Pennsylvanian age from Kansas coal balls3501426UNINA