aby Awera-e yearly levels of raitieao t.f7 deo kom significant than monthly levels vec .se tye accurately comparable witt idfecime for example, there aa an increise yearly rude a er iasitle .4 0% 4 cto. 8, Kia1 mioromiarocuries in October isfs te 6. dropped back to 15.6 in vecenber ft hesenter Bowe GRRE GEVE. ended October 1958 wae 11.4 conpared wits the year ended November 1959. 7 4 Tus oF 2.) em one «Ferns ear.) average rate °» oompared with the @0 mloromicr curter corsent sumed o- * permissible limit rate, IT am advisede-and dts 0d ge cite Bhgerin- that permissible lim ta are only c+ c.ater watimauen, to change as more and better ete “4 Active elements and their effet For example, 1 understa co vu Purtner oorsiae ation atrontiur}90 which 1s distrity ed TeveE oe .t@edy | ere tie. 4 £: ve Greet to on a a oe eee 8B cee Dw A eT ou rena ned deal more researc igs needed tov correlation between the arount ia a ot a ie cunan pody to consider lowering the recomewe strontiun-90. ico fo 6 on tie uo Tt ome " 8 Oe em gs ment in tne body, For the tire beirg the - rre MERE awe SR OS the most informed seientifie © iniot However, wien the tota. ora | | asai.-bis uF Soe Akay ny ” o, a: nnee eae eae—eooaeeeoe exposed is incre sed, reosures naxiqum omiee or SEmee om a Mk ae tt ne neeORG aw f

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