1. Magee, P. N., and Barnes, J. M., Adv. Cancer Res., 10, 163–246 (1967).
2. International Agency for Research on Cancer, Monograph on the Evaluation of Carcinogenic Risk of Chemicals to Man, 1, 95–144 (W.H.O. Lyons 1972).
3. Magee, P. N., Nicoll, J. W., Pegg, A. E., and Swann, P. F., Biochem. Soc. Trans. (in the press).
4. Swann, P. F., and Magee, P. N., Biochem. J., 110, 39–47 (1968).
5. Craddock, V. M., J. natn. Cancer Inst., 47, 899–907 (1971).