@book{
      international1993iaea,
      title={High Levels of Natural Radiation (proceedings of An International Conference, Organized by the Aeo of Iran in Co-operation With the IAEA, the Who, the Unep and the Ints and Held in Ramsar, Iran, 3-7 November 1990)},
      author={ },
      series={entity},
      number={ },
      year={1993},
      isbn={ },
      url={/publications/141/high-levels-of-natural-radiation-proceedings-of-an-international-conference-organized-by-the-aeo-of-iran-in-co-operation-with-the-iaea-the-who-the-unep-and-the-ints-and-held-in-ramsar-iran-3-7-november-1990 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }