VII - On the factors that influence external form of fossil plants; with descriptions of the foliage of some species of the Palaeozoic Equisetalean Genus Annularia Sternberg
- 13 August 1936
- journal article
- Published by The Royal Society in Philosophical Transactions of the Royal Society of London. B, Biological Sciences
- Vol. 226 (535), 219-237
- https://doi.org/10.1098/rstb.1936.0008