1. Mortality among male farmers in Finland during 1979–1983;Notkola;Scand. J. Work Environ. Hlth,1987
2. Occupational mortality patterns among British Columbia farm workers;Gallagher;J. occup. Med.,1984
3. Cancer risks among agricultural workers in Sweden. Cohort studies based on the cancer-environment register;Wiklund,1986
4. Mortality in Iowa farmers and farm laborers, 1971–1978;Burmeister;J. occup. Med.,1982
5. Dödsfallsregister 1961–1970;Statistika,1981