Abbas R. Ali and  Diana A. Bayiz,  Clay Mineralogy of Mukdadiya Formation in Shewasoor Area: Northeastern Kirkuk City, Iraq.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2016, vol. 112(4). 433 - 438
    [viewed 24 October 2021]. Available from: https://publications.waset.org/pdf/10004173.