1. Accident at Windscale No. 1 Pile on 10th October, 1957. Cmnd. 302. (H.M.S.O., 1957).
2. Booker, D. V., A.E.R.E. HP/R 2607 (1958).
3. Kimber, G., and Booth, A., Nature, 181, 1392 (1958).
4. Dunster, H. J., Howells, H., and Templeton, W. L., paper to Geneva Conference, A/CONF. 15/P/316 (to be published, 1958).
5. Chamberlain, A. C., A.E.R.E. HP/R 2606 (1958).