@book{
  international2003iaea,
  title={Guidelines for Radioelement Mapping Using Gamma Ray Spectrometry Data},
  series={TECDOC Series},
  number={1363},
  year={2003},
  isbn={92-0-108303-3},
  url={https://www.iaea.org/publications/6746/guidelines-for-radioelement-mapping-using-gamma-ray-spectrometry-data},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}