DIETARY INTAKE OF RADIONUCLIDES 893 In an attempt to compensate for the inadequacy of radionuclide estimates derived from food-consumption data, several approaches have been proposed: 1. Development of improved food-consumption estimates for many segments of the population. 2. Determination and use of appropriate ORurine/gier Values for the various population groups. Food-consumption information would not be necessary to obtain this information. 3. Use of the urinary '"Cs/"Sr ratio as a Sr indicator when environmentallevels of fallout are relatively stable. None of the preceding techniques will completely solve the problem, but each may aid in defining the population groups requiring further study. With the continued nuclear moratorium, the need is to refine our techniques of estimation so that in the future we will not suddenly be faced with a problem of high radionuclide intake from a specified area or group of people. Our current methods in this program leave much to be desired. If there is a definite need to determine accurate radionuclide-intake data, then much improvement is needed. ACKNOWLEDGMENT Special thanks are given to C. L. Comar for his comments and assistance in preparing this paper. REFERENCES 1. Agricultural Research Service, U. S. Department of Agriculture, Household Food Consumption Survey—1955, Reports 1 to 5, December 1956. 2. R. B. Reese and S. F. Adelson, Food Consumption and Dietary Levels Under the Pilot Food Stamp Program, Agricultural Economic Report No. 9, June 1962. 3. Economic Research Service, U. S. Department of Agriculture, National Food Situation— Food Consumption Per Capita, Report NSF-109, August 1964, 4, E. P. Hardy, Jr., et al., Fallout Program Quarterly Summary Reports, USAEC Reports HASL-105 (January 1961) to HASL-146 (July 1964), Health and Safety Laboratory. 5. M. H. Stein and E. 1. Childs, A Total Diet Composite, Report No. 18-60, Quartermaster Food and Container Institute for the Armed Forces, May 1960, 6. Division of Pharmacology, Food and Drug Administration, Teen-Ager Diet Survey, Radiol. Health Data, 4:18 (1963). 7, Agricultural Research Service, U. S. Department of Agriculture, High Consumption of Foods, Report HHE(Adm)-200, 1960. 8. Agricultural Marketing Service, U. S. Department of Agriculture, Federal Milk Order Market Statistics, Report Nos. FMOS-10 to -49, 1961 to 1964.

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