@book{
  international2003iaea,
  title={Guidelines for Radioelement Mapping Using Gamma Ray Spectrometry Data},
  series={TECDOC Series (CD-ROM)},
  number={1363},
  year={2003},
  isbn={92-0-109503-1},
  url={https://www.iaea.org/publications/6829/guidelines-for-radioelement-mapping-using-gamma-ray-spectrometry-data},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}