WASET
    A.Abbasi and  F.Mirekhtiary,  Survey Gamma Radiation Measurements in Commercially-used Natural Tiling Rocks in Iran.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2011, vol. 52(4). 561 - 567
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/4077.