1. Gratton, E. and Keigan, M. Patterns and Severity of Injury Accidents in a Hospital Sample of Road Traffic Accident Casualties. 5th International Conference on Accidents and Traffic Medicine. September1975, London.
2. TRRL Report LR 546;Jacobs G. D.,1973
3. TRRL Report LR 732;Jacobs G. D.,1976
4. TRRL Report SR 270;Jacobs G. D.,1977