@book{
  internationaliaea,
  title={International Directory of Certified Radioactive Materials},
  series={Technical Directories},
  year={},
  isbn={92-0-172075-0},
  url={https://www.iaea.org/publications/3167/international-directory-of-certified-radioactive-materials},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}