@book{
  internationaliaea,
  title={Animal Production and Health Newsletter No. 21, December 1994},
  series={Animal Production and Health Newsletter},
  year={},
  url={https://www.iaea.org/publications/4791/animal-production-and-health-newsletter-no-21-december-1994},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}