1. Alexander, F.W. 1974. The uptake of lead by children in differing environments. Environ. Health Perspect. 7, 155–159.
2. Alvares, A. P., Leigh, S., Cohn, J. and Kappas, A. 1972. Lead and methyl mercury: Effects of acute exposure on cytochrome P450 and the mixed function oxidase system in the liver. J. Exp. Med. 135, 1406–1409.
3. Arena, J. M. 1970. Poisoning: Toxicology—Symptoms—Treatments, 2nd ed. Charles C Thomas, Springfield, Illinois, pp. 198–207.
4. Berman, E., and McKiel, K. 1972. Is that toothpaste safe? Arch. Environ. Health 25, 64–65.
5. Cerklewski, F. L., and Forbes, R. M. 1976. Influence of dietary zinc on lead toxicity in the rat. J. Nutr. 106, 689–696.