ACKNOWLEDGEMENTS The authors wish to thank Dr. E. E. Held and Dr. T. Kawabata for the determination of Sr“~ 90 in the samples and Miss Dorothy South for the analyses confirming the presenceof Sb 125 and Eu 155 in the soil sample from Kabelle Island. The wholehearted support of all membersof the staff of the Laboratory of Radiation Biology is gratefully acknowledged. vi

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