_ & ~22- ce i 16. Muller, H. J., "Radiation damage to the genetic material," 93-165 in i?. Barendsen, G. W., T. L. J. Beusker, A. J. Vergroesen and L. Budke, Effects of different ionizing radiations on human cells in tissue culture II. Biological Experiments, Radiation Research 13, 841849, 1960. 18. Science in Progress, 7th Series, Yale Univer.itv Prees, 1949-1950. Barendsen, G. W., "Impairment of the proliferative capacity of human cells in culture vy a-particles with differing linear-energy transfer," Int. J. Rad. Biol. 8 (5), 453-466, 1964. 19. Mole, R. H., "Problems of low-level irradiation, pp 207-232 in Proceedings of Symposium on Internal Radiation, Heber, Utah, May 1969, ’ Dougherty et al. eds., Pergamon Press, 1962. 20. -Armitage, P. and R. Doll, "A two-stage theory of carcinogenesis in relation to the age distribution of human cancer," British Journal of Cancer il, 1§3 3-169, 1957. 21. Fisher, J. C., "Multiple-mutation theory of carcinogenesis," Nature 181, 651-652, 1958. 22. Spiess, H. and C. W. Mays, “Rone cancers induced by ??"Ra(ThX) in 23. children and adults," Hoalth Physics 19, 712-729, 1979. Ww Upton, A. C., M. L. Randolph and J. W. Conklin, "Late effects of fast neutrons and gamma-rays in mice as influenced by the dose rate of radiation: induction of neoplasia," Radiation Research 41, 467-491, 1970. 24. Buldakov, L. A., E. R. Lyubchanskii, Yu. I. Moskalev and A. P. Nifatov, Atom Publications, Moscow, 1969; A. A. Horvath, trans., and R. G. Thomas, ed., pp 192-193, Lovelace Foundation Report LF-tr-41, June 1970, Albuquerque, New Mexico. 25. Little, J. B., A. R. Kennecy and R. B. McGandy, “Lung cancer in 26. Radford, E. P., School of Hygiene and Public wealth, Johns Hopkins University, Baltimore, Maryland, (Personal communication). 27. Brues, A. M., “Critique of the linear theory of carcinogenesis," 28. Burch, P. R. J., “Radiation carcinogenesis: Nature 185, 125-134, 1960. 29. Raabe. 0. G., G. M. Kanapilly and H. A. Boyd, "Studies of the in vitro hamsters by low deses of alpha radiation from poionium-210,“Ga preparation). Science 128. a new hypothesis," , solubility of respirable particles of *?°Pu and 23%pu oxides and an accidentally released acrosol containing *39pu," pp 24-30 in inhalation Toxicology Research Institute Annual Report 1972-1973, Lovelace Foundation, Albuquerquc, New Mexico, LF-46, 1973.