1. Driver age and sex related to accident time and type;Campbell;Traf. Saf. Res. Rev.,1966
2. Older drivers, the age factor in traffic safety;Cerrelli,1989
3. Older driver involvement in fatal and severe traffic crashes;Evans;J. Ger. Soc. Sci.,1988
4. Highway Statistics 1985;Federal Highway Administration,1985
5. Highway Statistics. Summary to 1975;Federal Highway Administration,1975