1. Isotopic ages of British Carboniferous rocks;Fitch,1970
2. Geological Survey of Great Britain. 1965. Aeromagnetic map of Great Britain. 1:625 000. Sheet 2, Southampton, Ordance Survey.
3. Institute of Geological Sciences. 1980.1:2500 000 Series. Aeromagnetic anomaly map - East Midlands. NERC.