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  • 1 National Bureau of Standards Radioactivity Section 20234 Washington, D. C. (USA)
  • | 2 The 1st Research Center of Technical Research and Development Institute Japan Defense Agency 2-2-1, Nakameguro, Meguro-ku Tokyo (Japan)
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The low-level radioactivity laboratory in the Radioactivity Section of the National Bureau of Standards, and its work in producing standards for monitoring in the environment, are described.