@book{
  international1967iaea,
  title={Radioisotope Tracers in Industry and Geophysics (Prague, 21-25 Nov. 1966)},
  series={Proceedings Series},
  year={1967},
  isbn={92-0-060067-0},
  url={https://www.iaea.org/publications/2099/radioisotope-tracers-in-industry-and-geophysics-prague-21-25-nov-1966},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}