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2. The Jurassic System in Great Britain;Arkell,1933
3. On the Kimmeridge Clay of England;Blake;Q.J. Geol. Soc. Lond.,1875
4. The secular variations of the orbital elements of the principal planets;Brouwer;Astron. Pap. Am. Ephem.,1950
5. The palaeontology and stratigraphy of the lower part of the Upper Kimmeridge Clay of Dorset;Cope;Bull. Brit. Mus. Nat. Hist.,1967