1. Fricke, H., and Hart, E. J., J. Chem. Phys., 6, 229 (1938).
2. For review, see Lefort, M., in “Actions Chimiques et Biologiques des Radiations” (Masson et Cie, Paris, 1955).
3. Weiss, J., Nature, 153, 748 (1944); Brit. J. Radiol., Supp. 1, 56 (1947).
4. Allen, A. O., “Ann. Rev. Phys. Chem.”, 3, 57 (1952).
5. Lea, O. E., “Actions of Radiation on Living Cells” (Camb. Univ. Press, London, 1946).