At: Acta Palaeobotanica, 60, 1 By: Hably L.
journalAt: University of California Publications in Geological Sciences, 35, 2 By: MacGinitie H. D.
journalAt: Bulletin / National Museum of Canada, 58 By: Berry E. W.
journalAt: Geografiska annaler, 17, 1 By: Chaney R. W.
journalAt: Publications of the Carnegie Institution of Washington, 465 By: Potbury S. S.
journalAt: Torreya, 23, 3 By: Cockerell T. D. A.
journalAt: Professional Papers / United States Geological Survey, 130 By: Knowlton F. H.
journalAt: Scientific reports, 13, 17 By: Sadowski E.-M., Hofmann C.-C.
journalAt: Botany, 9 By: Wilf P., Stevenson D., Cúneo N. R.
journalAt: Journal of Paleontology, 40, 2 By: Johnson J. H.