1. The environmental history of the Boulonnais, France;Ager;Proceedings of the Geologists’ Association,1966
2. The distribution and significance of trace fossils in the uppermost Jurassic rocks of the Boulonnais, Northern France;Ager,1970
3. Le Boulonnais: Géologie du Nord de La France;Bonte;Annales de la Societé Géologique du Nord,1969
4. The stratigraphy and ammonite succession of the Oxford and Kimmeridge Clays in the Warlingham Borehole;Callomon;Bulletin of the Geological Survey of Great Britain,1971
5. The Kimmeridge Clay of the Dorset type area and its correlation with other Kimmeridgian sequences;Cox,1981