Potter, G.D., Lindsay, S., and Chaikoff, I.L.: Induction of neoplasms in rat thyroid glands by low doses or radioiodine. Arch.Pathol. 69; 257, 1960. Rall, J.E. and Conard, R.A.: Elevation of serum protein bound iodine level in inhabitants of Marshall Islands. Am. J. Med. 40: 883, 1966. Sheline, G.E., Lindsay, S., McCormack, K.R., and Galante, M.: Thyroid nodules occurccing late after treatment of thyrotoxicosis with radioiodine. Endocrinology, Metabolism 22; 8, 1962. J. Ciin. Simpson, C.L., Hempelmann, L.H., and Fuller, L.M.: Neoplasia in chiidren treated with x rays in infancy for thymic eniargement. Radioiogy 64: 840, Snider, R.S., and Raper, J.R.: Ed. 1. -Ch. 9. New York: 1955. Biological effects of external beta radiation, McGraw-ilill Book Co., 1951. Socolow, E.L., Washizume, A., Nerii, §$., Niitani, R.: , oe Thyroid carcinoma in man aftey exposure to ionizing radiation. A summary of the findings in Hiroshima and Nagasaki. New Eng. J. Med. 268: 406, 1963. Sonchaus, C.A.,et al.: Some effects of ionizing radiation on human beings. Edited by E.?. Cronkite, V.?. Bond, and C.L. Dunham, U.S. Government Printing Office, TID 5358, July, 1956. Sutow, W.W., Conard, R.A., and Griffith, K.M.: Growth status of children exposed to failout raciation on Marshall Islands. Pediatrics 36: 721, 1965. 9067324