we 16. i CD 1?. 19. fuller, H. J., "Radiation damage to the genetic matertal," 93-165 in Science in Prozress, sth Series, Yaic University Press, 1949-1950. eoienceanwres3s Barendsen, G. W., T. L. J. Beusker, A. J. Vergroesen and L. Budke, Effects of different 4tonizing- radiations on huzan cells in tissue culture Il. Bislezical Experduents, Reviation aesearech 13, 841£49, 1960. . Parendsen, %, V)o, “Troairment cf the proliferaciva carecity of human cells in culture ty u-particles with diffcring linear-energy transfer," Int. 3. Rad. Piol. 8 (5), 453-466, 1964. . Proceedings of Sjyrrosium on Internal Radiation, Heber, Utah, May 1969, Dougherty et al. 20. ~, Mole, R. H., "Problems of low-level irradiation, pp 207-232 in eds., Pergamon Press, 1952 Armitage, P. and R. Doll, "A two-stage theory of carcinogenesis ‘in relation to the age distribution of human cancer," 4 WAI_VEO AKET of Cancer 11, 161-169, 1957. Sewoesce British Journal ton 21. Fisher, J. C., "Multiple-mutation theory of carcinogenesis," Nature 161, 22. Spiess, H. end C. W. Mays, “Bone cancers induced by 224R- (TUX) in children and adults," Health Physics 19, 713-729, 1970. 23. Upton, A. C., M. L. Ranéclph and J. W. Conklin, “Late effects of fast neutrons ang ginta-rays in mice as influenced by the dose rate of 651-652, 1958. radiation: induction of neoplasia," Radiation Research 41, 467-491, 1970. 24, 25. Buldakov, L. A., E. R. Lyubchanskii, Yu. I. Moskalev and A. ®. Nifatov, Atom Publications, Moscow, 1969; A. A. Horvath, trans., and R, G. Thomas, ed., pp 192-193, Lovelace Foundaticna Report LP-tr-4i, June 1970, Albuquerque, New Mexico. . Little, J. B., A. R. Kennedy and R. B. McGandy, “Lung cancer in hansters by low coses of alpha radiation from pcionium-210,"(in preparation). 26. 27. Radford, E. P., School of Hygiene and Public Heaith, Johns Hopkins University, Baltimore, Maryland, (Personal communication). Brues, A. M., "Critique of the linear theory of carcinogenesis," Science 128. Burch, P. R. J., “Radiation carcinogenesis: a new hypothesis," 28. Nature 185, 125-134, 1960. 29. Raabe, 0. G., G. MN. Kanapilly and H. A. Boyd, “Studies of the in vitro solubility of respirable particles of 238puy and 73°Pu oxides and an accidentaliy released aerosol containing #39p you pp 24-30 in Inhalation Toxicology Research Institute Annual Report 1972-1973, Lovelace Foundation, Albuquerque, New Mexico, LF-46, 1973.