@book{
  international2019iaea,
  title={World Thorium Occurrences, Deposits and Resources},
  series={TECDOC Series},
  number={1877},
  year={2019},
  isbn={978-92-0-103719-0},
  url={https://www.iaea.org/publications/13550/world-thorium-occurrences-deposits-and-resources},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}