Chapter

Banks, H.P., Collett, M.G., Gnauck, F.R. & Hughes, N.F. 1967. Chapter 5 Pteridophyta - 2. In W.B. Harland, C.H. Holland, M.R. House, N.F. Hughes, A.B. Reynolds, M.J.S. Rudwick, G.E. Satterthwaite, L.B.H. Tarlo & E.C. Willey (eds.), Foss. Rec., Oct 1967: 233-245. ≡