1. Annual Report of the Chief Inspector of Factories;London, H.M.S.O.;Cmd
2. H.M.S.O. London.
3. Aub, J. C., Fairhall, L. T., Minot, A. S., and Reznikoff, P. (1926).
4. Lead Poisoning."
5. Report of the Director General of Public Health;Badham, C.; Taylor, H.B.,1927