period. fie standard deviation was in general 30% of the mean value for all age and sex subgroup distributions. the fact and that 65 This less pronounced variation may be due to . . Zn measurements took place over a three year interval while 90, 137, . . . Cs occurred over a 23 year interval and thus was contained in a more homogeneous population than were the longer lived nuclides. . . . 90 . Figures 22 and 23a and 23b summarize the Sr dose equivalent results for individuals at Rongelap. In this analysis only the ingestion pathway was considered important. Al~ though some radioactivity would enter the body via resuspension and direct inha~ lation pathways, it is known that the ratios of food and fluid intake to blood relative to airborne intake to blood, for the stable naturally occurring analogs to the radionuclides considered here, are as follows: Co > 3000 Zn > 130 Fe 550 Sr > 10,000 Cs 400 22