At: Science, New Series, 1, 13 By: Ward L. F.
journalAt: Journal of the Faculty of Science of the Hokkaido Imperial University, Series, 4, Geology and mineralogy, 5, 2-4 By: Ôishi S.
journalAt: Review of Palaeobotany and Palynology, 210 By: Nosova N. V., Golovneva L. B.
journalAt: Mining and geological journal, 6, 5 By: Douglas J. G.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 141, 1-2 By: Becker H. F.
journalAt: Geological Magazine, 76, 11 By: Murray N.
journalAt: Professional Papers / United States Geological Survey, 92 By: Berry E. W.
journalAt: Review of Palaeobotany and Palynology, 193 By: Kostina E. I., Herman A. B.
journalAt: University of California Publications in Geological Sciences, 137 By: Axelrod D. I.
journalAt: Acta Palaeobotanica, 37, 1 By: Łańcucka-Środoniowa M., Zastawniak E.