149 RADIATION STANDARDS, INCLUDING FALLOUT DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE ~- PUBLIC HEALTH SERVICE Radiation Surveillance Center Iodine 131 Accumulated Levels as a Percentage of FRC Ranges 356-73 SEM{-LOGARITHMIC AEUPFEL ® KOSER CO. 2 CYCLES W140 DIVISIONS KE | || --- wuc of Iodine 131 Divisiqn of Radiological Health July Aug 19 61 Sept Oct Noy Dec Jan Feb Masch 1962 April May June RHEARGSTARR _ % ene

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