1. The abbreviated injury scale, 1985 revision;American Association for Automotive Medicine,1985
2. American national standard method of recording basic facts relating to the nature and occurrence of work injuries;American National Standards Institute,1962
3. Assuming the risks: Occupational disease in the years before workers compensation;Bale;American Journal of Industrial Medicine,1988
4. Use of census data combined with occupational accident data;Broberg;Journal of Occupational Accidents,1984
5. 1980 census of population, Alphabetic index of industries and occupations;Bureau of the Census,1980