Appendix: Paleogene biostratigraphic markers. (In: Paleogene of the Central and northern North Sea. R.W.O.B. Knox and S.Holloway, editors)
Reference:
Harland,R. et al. (1992)
Appendix: Paleogene biostratigraphic markers. (In: Paleogene of the Central and northern North Sea. R.W.O.B. Knox and S.Holloway, editors) Lithostratigraphic Nomenclature of the UK North Sea
Vol. 1 P. A1- A5