“Acknowledgment.
Tne authors gratefully acknowledge support by the
Fallout Studies Branch, Division of Biology and Medicine, U. 5. Atomic
Energy Commission.
The assistance of the Office of Criteria end
Standards, Division of Environmental Radiation, and the Southwestern
Radiological Health Laboratory of the Bureau of Radiological Health,
‘
.
for his invaluable aid in preparing this paper.
rh
Finally, we should like to thenk our colleague, Robert List,
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appreciated.
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Public Health Service, Department of Health, Education and Welfare is