1. Adkirts, B., Jr., Luginbuhl, G. H., Miller, F. J., and Gardner, D. E., 1980, Increased pulmonary susceptibility to streptococcal infection following inhalation of manganese oxide, Environ. Res. 23:110.
2. Anonymous, 1972, Lead, airborne lead, in: National Academy of Sciences Perspective p. 330.
3. Badenoch-Jones, P., 1978, Metal activation of macrophages, Ann. Rev. R. Coll. Surgeons 60:211.
4. Badenoch-Jones, P., Turk, J. L., and Parker, D., 1978, The effects of some aluminum and zirconium compounds on guinea pig peritoneal macrophages and skin fibroblasts in culture, J. Pathol. 124:51.
5. Bakir, F., 1973, Methylmercury poisoning in Iraq: An interuniversity report, Science 181:230.