in the tigure nor were they included in any dosimetric distributions for any of the tuclides. 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 137 Cs: awong the Rongelapese. . . . : The shape or the population distribution was Pois:on with a mean of 1.7 Rem and a maximum of 9.0 Rem. 5.3 (imes che mean value for 137¢, on Rongelap. Thus the maximum was An examination of the subgroup distributions reveals that persons who were infants at the time of rehabitation at Rong: lap 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 137¢, than that for adults or even children. The parame- ter having the greatest impact on the infant dose equivalent was body mass. The standard deviation for the adult males 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 evinces mean dose equivalents as a function of returning age groups for 6570 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 6500 data for persons who were infants at the return date were not reported in the publications by Conard, et al. Figure 21 shows the dosimetric distributions observed for members of the Rongelap population for O57. Again the population overall exhibited a Poisson 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 year 21