At: Canadian Record of Science, 3, 3 By: Dawson J. W.
journalAt: Svensk Botanisk Tidskrift, 45, 2 By: Erdtman G.
journalAt: Reports of the Association of American Geologists and Naturalists, 1-2-3 By: Rogers W. B.
journalAt: Proceedings of the National Institute of Sciences of India, 12, 8 By: Chowdhury K. A., Ghosh S. S.
journalAt: Annals of Botany, 31, CXXIII-CXXIV By: Holden R.
journalAt: Boletim / Instituto Geociências, Universidade de São Paulo, 9 By: Mussa D.
journalAt: Geološki vjesnik, 1959, 13 By: Kochansky V., Herak M.
journalAt: Japanese Journal of Botany, 11, 3 By: Miki S.
journalAt: Japanese Journal of Botany, 9, 2 By: Miki S.
journalAt: Quarterly Journal of the Geological Society of London, Part I, 58, 229 By: Arber E. A. N.