1. Geological notes and local details for 1:10,000 Sheet SP60NE (Long Crendon);Ambrose;British Geological Survey Technical Report,1989
2. Brill Borehole;Ambrose;Rep. Brit. Geol. Surv.,1988
3. The geology of Oxford;Arkell,1947
4. Geological notes and local details for 1:10,000 Sheet SP61SE (Brill);Barron;British Geological Survey Open File Report,1988
5. The Upper Kimmeridge Clay of the M40 motorway, east of Oxford;Cox;Proc. Cotteswold Nat. Field Club,1990