1. Platt, J. R., Perspectives in Biology and Medicine, 2, 24 (1958).
2. Harford, C. G., and Hamlin, A., Nature, 189, 505 (1961).
3. Harford, C. G., and Hamlin, A., Lab. Invest., 10, 627 (1961).
4. Johns, H. E., and Laughlin, J. S., in Radiation Dosimetry, edit. by Hine and Brownell (Academic Press, Inc., New York, 1956).
5. Lea, D. E., Actions of Radiations on Living Cells (Cambridge Univ. Press, 1956).