1. Hunter, D., The Diseases of Occupations (English Universities Press, London, 1955).
2. McCallum, R. I., Sanderson, J. T., and Richards, A. E., Ann. occup. Hyg., 11, 101 (1968).
3. McCallum, R. I., Ann. occup. Hyg., 6, 55 (1963).
4. Evans, D. M., Br. med. J., 1, 173 (1960).
5. Windeyer, B. S., Report of a Committee Appointed to Inquire into Lead Poisonings at the RTZ Smelter at Avonmouth (HMSO, London, Cwmnd. 5042, 1972).