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Published online by Cambridge University Press: 01 May 2009
1 Kidston, R. 1923–5. “Fossil Plants of the Carboniferous Rocks of Great Britain,” Mem. Geol. Surv., Palaeontology, ii.
2 Crookall, R. 1932. “The Supposed ‘Lanarkian” in Shropshire,” The Naturalist, 72–3.
3 Crookall, R. 1931. “A Critical Revision of Kidston's Coal Measure Floras,” Proc. Roy. Phys. Soc. Edin., xxii, i, 1–34.
4 Macgregor, M. 1928–9. “ Scottish Carboniferous Stratigraphy: an Introduction to the Study of the Carboniferous Rocks of Scotland,” Trans. Geol. Soc. Glasgow, xviii, iii, pi. 3.