WASET
    Asaad H. Ismail and  Mohamad S. Jaafar,  Hazards Assessment of Radon Exhalation Rate and Radium Content in the Soil Samples in Iraqi Kurdistan Using Passive and Active Detecting Methods.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2010, vol. 46(10). 473 - 476
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/14495.