1. Levan, A., Genetics and Cancer, 151 (Univ. Texas, Austin, 1959).
2. Gray, L. H., Ciba Found. Sym. Ionizing Radiations and Cell Metabolism, 255 (Churchill, Ltd., 1956).
3. Hauschka, T. S., Mitchell, J. T., and Reinhard, M., Proc. Amer. Assoc. Cancer Res., 3, 26 (1959).
4. Révész, L., and Norman, U., J. Nat. Cancer Inst., 25, 1041 (1960).
5. Silini, G., and Hornsey, S., Intern. J. Rad. Biol., 5, 147 (1962).