in the figure nor were they included in any dosimetric distributions for any of the nuclides.~ Thus all persons considered, regardless of initial age in 1957, experienced a 23 year exposure interval. Figure 19 shows dose equivalent distributions according to age and sex for 1376, among the Rongelapese. The shape or the population distribution was skewed with a mean of 1.7 Rem and a maximum of 9.0 Rem. 5.3 times the mean value for 1376, on Rongelap. Thus the maximum was An examination of the subgroup distributions reveals that persons who were infants at the time of rehabitation at Rongelap also were the recipients of the higher doses. This was due to the combined effects of lower average body mass, a higher average ingestion rate, and more rapid turnover of 1376, than that for adults or even children. The pa- rameter having the greatest impact on the infant dose equivalent was body mass. The standard deviation for the adult male distribution was 49% of the mean dose equivalent, for adult females 43% of the mean dose equivalent, and for adolescents 47%. Within a subgroup, the maximum observed dose equivalent was approxi- mately twice the mean value for all distributions considered here. Figure 20 shows mean dose equivalents as a function of returning age groups for 6578 on Rongelap. Adolescents, young adults, and adults 50 and up were the groups receiving lower total dose equivalents, while children and middle aged persons received higher dose equivalents during the residence interval. Measured 6520 data for persons who were infants at the return date were not reported in the publications by Conard et al. Figure 2] shows the dosimetric distributions observed for members of the Rongelap population for Soon. Again the population overall exhibited a skewed distribution of dose with a maximum value nearly three times the mean. Children demonstrated higher doses than persons who were adults during the entire 23 39