1. Morphology and Evolution of Fossil Plants;Delevoryas,1962
2. The Lower Carboniferous Rocks of the Menaian region of Caernarvonshire;Greenly;Q.J. Geol. Soc.,1928
3. Mesozoic seed cuticles;Harris;Svensk. Bot. Tidsk.,1954
4. The seed of Caytonia;Harris;Palaeobotanist,1958
5. Miospores from the Lower Carboniferous Basement Beds in the Menai Straits region of Caernarvonshire, North Wales;Hibbert;Palaeontology,1969