At: Handb. Paläobot., München–Berlin, R. Oldenbourg, 1 By: Hirmer M.
journalAt: Series of reports dealing with the systematic geology and paleontology of Maryland / Maryland Geological Survey, 4 By: Berry E. W.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 101, 1-4 By: Leggewie W., Schonefeld W.
journalAt: Journal of Paleontology, 22, 6 By: Schopf J. M.
journalAt: American Journal of Botany, 24, 9 By: Arnold C. A., Steidtmann W. E.
bookAt: Iskop. Tsvetk. Rast. Ross., St.-Petersburg, 3 By: Dorofeev P. I.
bookAt: Iskop. Tsvetk. Rast. Ross., St.-Petersburg, 3 By: Iljinskaja I. A.
journalAt: Journal of Japanese Botany, 91, 2 By: Doweld A. B.
journalAt: American Journal of Botany, 69, 2 By: Manchester S. R., Dilcher D. L.
journalAt: Revue Générale de Botanique, 81, 962-964 By: Privé C.