1. Dungworth, D. L., Cross, C. E., Gillespie, J. R., and Plopper, C. G., in Ozone Chemistry and Technology (edit. by Murphy, J. S. and Orr, J. R.), ch 2, 29–46 (Franklin Institute Press, Philadelphia, 1975).
2. Menzel, D. B., A. Rev. Pharmac., 10, 379–394 (1970).
3. Stokinger, H. E., and Coffin, D. L., in Air Pollution, 1, (edit. by Stern, A. C.), 446–546 (Academic, New York, 1968).
4. Stokinger, H. E., Scheel, L. D., Archs Environ. Health, 4, 327–334 (1962).
5. Stokinger, H. E., Wagner, W. D., and Wright, P. G., Archs Industr. Health, 14, 158–162 (1958).