WASET
    El-Said. I. Shabana and  Mohammad S. Tayeb and  Maher M. T. Qutub and  Abdulraheem A. Kinsara,  Radon-222 Concentration and Potential Risk to Workers of Al-Jalamid Phosphate Mines, North Province, Saudi Arabia.   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 118(10). 518 - 521
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10005693.