@book{
  international2007iaea,
  title={X Ray Fluorescence in the IAEA and its Member States
Newsletter No. 12, December 2006},
  series={XRF Newsletter},
  year={2007},
  url={https://www.iaea.org/publications/7729/x-ray-fluorescence-in-the-iaea-and-its-member-states-newsletter-no-12-december-2006},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}