1. Johnson DE, Tillery JB, Prevost RJ (1975) Levels of platinum, palladium, and lead in populations of Southern California. Environ Health Perspect 12:27?33
2. Johnson DE, Prevost RJ, Tillery JB, Kimball KT, Hosenfeld JM (1978) Epidemiological study of the effects of automobile traffic on blood lead levels. EPA 600/1-78-055:187
3. Ostle B, Mensing RW (1975) Statistics in research, 3rd edn. Iowa State University Press, Ames, IA
4. Reece RM, Reed AJ, Clark CS, Angoff R, Casey KR, Challop RS, McCabe EA (1972) Elevated blood lead levels and the in situ analysis of wall paint by X-ray fluorescence. Am J Dis Child 124:500?502
5. Sachs HK (1974) Effect of screening programs on changing patterns of lead poisoning. Environ Health Perspect 7:41?45