At: Geologie, 18, 1 By: Jähnichen H.
journalAt: University studies, University of Nebraska, 14, 1 By: Bessey C. E.
journalAt: Botaniska Notiser, 1954, 1 By: Horn af Rantzien H.
journalAt: Journal of the Faculty of Science of the Hokkaido University, Series, 4, Geology and mineralogy, 20, 4 By: Tanai T.
journalAt: Senckenbergiana Lethaea, 84, 1-2 By: Kvaček Z.
journalAt: Professional Papers / United States Geological Survey, 1026 By: Tanai T., Wolfe J. A.
journalAt: Sborník Národního Muzea v Praze, Řada, Řada B, Přírodni vědy (Přírodovědný 1938-1957), 70, 3-4 By: Manchester S. R.
journalAt: Paleontologicheskii Zhurnal, 1965, 3 By: Dobruskina I. A.
journalAt: Botanicheskii Zhurnal, 75, 5 By: Maslova N. P., Fotjanova L. I.
journalAt: Botanicheskii Zhurnal, 103, 2 By: Alexeev P. I.