At: Memoirs of the Geological Survey of Great Britain, Series, Palaeontology, 1, 3 By: Lee G. W.
bookAt: Brit. Rhaet. Fl., London, The British Museum (Natural History) By: Harris T. M.
journalAt: Australian journal of botany, 2, 1 By: Cookson I. C.
journalAt: American Journal of Botany, 60, 7 By: Matten L. C.
journalAt: Palaeontographica, Abtheilung, B, Paläophytologie, 173, 4-6 By: Rothwell G. W.
journalAt: Review of Palaeobotany and Palynology, 32, 1 By: Rothwell G. W.
journalAt: Ottawa naturalist, 15, 5 By: White D.
journalAt: Bulletin of the British Museum (Natural History), Series, Geology, 2, 5 By: Jongmans W. J.
journalAt: Transactions of the Natural History Society of Glasgow, New Series, 6, 1 By: Kidston R.
journalAt: Studia Biologica Academiae Scientiarum Hungaricae, 22 By: Hably L., Szakály M.