1. Vital Statistics Special Report;L Guralnick,1963
2. Registrar General: The Registrar General's decennial supplement, England and Wales: Occupational mortality tables. London, HMSO (1971).
3. Fox A J, Goldblatt P O: Longitudinal study of sociodemographic mortality differentials, 1971–1975. London, HMSO (1980).
4. McMichael A J, Hartshorne J M: Mortality risks in Australian men by occupational groups, 1968–1978.Med J Aust
1, 253 (1982).
5. Burmeister L F, Morgan D P: Mortality in Iowa farmers and farm laborers, 1971–1978.J occup Med
24, 898 (1982).