1. Araki, S., Honma, T.: Relationship between lead absorption and peripheral nerve conduction velocities in lead workers. Scand. J. Work. Environm. Hlth. 4, 225 (1976)
2. Catton, M.J., Harrison, M.J.G., Fullerton, P.M., Kazantzis, G.: Subclinical neuropathy in lead workers. Brit. Med. J. II, 80 (1970)
3. Hernberg, S.: Lead. In: Occupational medicine; principles and practical applications. (C. Zenz, ed.) p. 715 Chicago: Year book Medical publishers. 1975
4. Hernberg, S.: Biochemical subclinical and clinical responses to lead and their relation to different exposure levels, as indicated by the concentration of lead in blood. In: Effect and dose-response relationships of toxic metals. (G.F. Nordberg, ed.) p. 404 Amsterdam: Elsevier 1976
5. International Labour Office (ILO): Encyclopaedia of occupational health and safety, Vol. 11, p. 767. Geneva: ILO 1972