59 Sacher, G.A., D. Grahn, R.J.M. Fry et al. Epidemiological and cellular effects of chronic radiation exposure: a search for relationship, p. 13-38 in First European Symposium on Late Effects of Radiation (P. Metalli, ed.). Comitato Nazionale Energia Nucleare, Rome, 1970. S6 Storer, J.B. Radiation carcinogenesis, p. 453-483 in Cancer, Vol. 1 (F.F. Becker, ed.). Plenum Publ. Comp., New York, 1975. ST Strehler, B.L. s8 S9 510 Time, cells and aging. Storer, J.B. Rate of recovery from radiation damage and its possible rela- Storer, J.B. Rate of recovery from radiation damage and its possible rela- tionship to life-shortening in mice. report LA-222h, 1958. tionship to life-shortening in mice. 512 Los Alamos Scientific Laboratory Radiat. Res. 10: 180-196 (1959). Spalding, J.F., V.G. Strang and F.C.V. Worman. Effects of graded acute exposures or gamma-rays of fission neutrons on survival in subsequent pro- tracted gamma-ray exposures. S811 Academic Press, New York, 1962. Radiat. Res. 13: 415-23 (1960). Spalding, J.F., D.S. Johnson and G.L. Tietjen. An investigation of the two-component radiation injury concept using equivalent residual dose factors. Los Alamos Scientific Laboratory report LA-5813-MS (1974). Sacher, G.A. and E. Trucco. The stochastic theory of mortality. 543 Sacher, G.A. and E. Trucco. Theory of radiation injury and recovery S14 Sacher, G.A. Acad. Sci. 96: 985-1007 (1962). in self renewing cell populations. $16 S17 S18 Radiat. Res. 29: 236-256 (1966). Dose dependence for life-shortening by x-rays, gamma-rays and fast neutrons, p. 1425-1432 in Advances in Radiation Research, Vol. 3 (J.F. Duplan and A. Chapiro, eds.). 815 Ann. N.Y. Stover, B.J. and H. Eyring. theory of mutation rates. The dynamics of life. II. The steady-state Proc. Natl. Acad. Sci. (USA) 66: 672-676 (1970). Sato, F., W. Nakamura and I. Eto. shortenings by radiation. Gordon and Breach, New York, 1973. A simple mathematical model for life J. Radiat. Res. 11: 145-150 (1970). Storer, J.B. and P.C. Sanders. Relative effectiveness of neutrons for production of delayed biological effects. I. Effect of single doses of thermal neutrons on life-span of mice. Radiat. Res. 8: 64-70 (1958). Storer, J.B., B.S. Rogers, I.U. Boone et al. Relative effectiveness of neutrons for production of delayed biological effects. II. Effect of single doses of neutrons from an atomic weapon on life-span of mice. Radiat. Res. 8: 71-76 (1958). 519 520 Storer, J.B. Evaluation of radiation response as an index of aging in Storer, J.B. Radiation resistance with age in formal and irradiated popu- mice. Radiat. Res. 17: 878-902 (1962). lations of mice. Radiat. Res. 25: 435-59 (1965). we

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