ere Hamil iton, Je G., M. H. 70 Soley, We. Ae Reilly, and K. 8B. Eichorn, 1943, Radioactive jodine studies in childhood hypothyroidism, Amer. J. Dis. Child. 66: 625. Hansborough, L. A. and M. Kahn, 1951, The initial function of the chick thyroid gland with the use of radiofodine (1131), J. Exper. Zool. 116: 447, Hansborough, L. Ae and H. Seay, 1951, Accumulation of radiofodine (1137) in the thyroid gland of the hamster embryo, Proc. Soc. Exp. Biol. Med. 78: 48]. Hanson, We C., 1967, Radigecological concentration processes characterizing Arctic ecosystems, In Radioecological Concentration Processes (B. Aberg and F. P. Hungate, Editors), Pergamon Press, Oxford, p. 183. Hanson, W. C. (Editor), 1980, Transuranic Elements in the Environment, Technical Information Center, US Department of Energy, 728 pp. Healy, J. We. (Editor), 1975, Plutontum--Health implications for man, Proceedings of the Second Los Alamos Life Sciences Symposium, Health Phys. 29: 44)-632, Held, £E. C., 1963, Some aspects of the biology of zirconium-95, In Radioecology (V. Schultz and A. W. Klement, Jr., Editors), p. 577, Reinhold Publishing Corporation, New York, and the American Institute of Biological Sciences, Washington, 0. C.