At: Palaeobotanist, 1977, 26, 3 By: Trivedi B. S., Misra J. P.
journalAt: Johns Hopkins University Studies in Geology, 11 By: Endô S.
journalAt: Proceedings of the Geological Society of London, 1967, 1640 By: Wagner R. H.
journalAt: Proceedings of the Academy of Natural Sciences of Philadelphia, 75 By: Gardner N. L.
journalAt: American Journal of Botany, 85, 9 By: Crepet W. L., Nixon K. C.
journalAt: Neues Jahrbuch für Geologie und Paläontologie Monatshefte, 1995, 12 By: Czier Z.
journalAt: Torreya, 9, 9 By: Cockerell T. D. A.
journalAt: University of Kansas Science Bulletin, 38, 2, Art. 20 By: Leonard A. B.
journalAt: Proceedings of the United States National Museum, 51, 2154 By: Wherry E. T.
journalAt: Memoirs of the Institute of Field Education, Yokohama National University, 2 By: Ozaki K.