1. The Nature of the Stratigraphical Record;Ager,1981
2. The Abyss of Time: Changing Conceptions of the Earth's Antiquity After the Sixteenth Century;Albritton,1986
3. The Jurassic System in Great Britain;Arkell,1933
4. Growth of a Prehistoric Time Scale Based on Organic Evolution;Berry,1987
5. Principles of Sedimentology and Stratigraphy;Boggs,2001