[en] Of the fission products produced by the 1976 detonation of nuclear devices in China, the levels of ¹³¹I found in milk collected in FDA Regions I and III early in October were all in Range III of the FRC intake guides. The levels of ¹⁴⁰Ba-La, ¹³⁷Cs and ⁹⁰Sr were all in within Range I of the guides. As determined by successive sampling, the clearance half-times for ¹³¹I, ¹⁴⁰Ba-La and ¹³⁷Cs from milk were between 5 and 9 days. The levels of ¹³¹I in milk of Regions I and III did not fall below Range III until early November. The maximum dose commitment to the infant thyroid due to ¹³¹I would have been less than 30% of the annual limit of 0.5 rem recommended by the FRC guides. The dose commitment to the teenage thyroid would have been about 4% of the FRC limit. (author)