At: Journal of the Botanical Research Institute of Texas, 8, 1 By: Poinar G. O., Alfredo D. S., Baseia I. G.
journalAt: Proceedings of the Section of Science / Koninklijke Akademie van Wetenschappen te Amsterdam, 13, 1 By: Reid C., Reid E. M.
journalAt: Verslagen van de gewone vergaderingen des wis- en natuurkundige afdeeling der Koninklijke Akademie van Wetenschappen te Amsterdam, 19, 1 By: Reid C., Reid E. M.
journalAt: Canadian Journal of Botany, 83, 6 By: Bogner J., Hoffmann G. L., Aulenback K. R.
journalAt: The Botanique, 15, 1-2 By: Sheikh M. T.
journalAt: Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, 163, 3 By: Dolezych M., Estrada S.
journalAt: Palaeobotanist, 1968, 17, 3 By: Awasthi N.
journalAt: Annals of Botany, 31, 71 By: Yasui K.
bookAt: Geol. Indus Sut. Ladakh, Dehra-Dun, Wadia Institute of Himalayan Geology By: Guleria J. S., Thakur B., Virdi N. S., Lakhanpal R. N.
journalAt: Journal of the Indian Botanical Society, 67 By: Trivedi B. S., Srivastava K.