At: Summary of progress of the Geological Survey of Great Britain and the Museum of Practical Geology, 1926 By: Crookall R.
journalAt: Lloydia, 1952, 15, 4 By: Bhardwaj D. C.
bookAt: New Sp. Tempskya, St.-Petersburg, Tipografija Birkenfel'd By: Kidston R., Gwynne-Vaughan H.
journalAt: Zapiski Imperatorskago Sankt-Peterburgskago Mineralogicheskago Obshchestva, Series, 2, 48, 1 By: Kidston R., Gwynne-Vaughan H.
journalAt: Quarterly Journal of the Geological Society of London, Part I, 10, 2=38 By: Hooker J. D.
journalAt: Transactions and proceedings of the Palaeontological Society of Japan, 143 By: Nishida H.
journalAt: Annals of Botany, 26, 1 By: Scott D. H.
journalAt: Proceedings [of the] Indian Academy of Sciences, Series, Section B, biological sciences, 62, 1 By: Menon V. K.
journalAt: Quarterly Journal of Microscopical Science, New Series, 12, 48 By: Carruthers W.
journalAt: Transactions of the Geological Society London, Series 2, 2, 1 By: Lyell C.