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Abbas R. Ali and  Diana A. Bayiz,  Clay Mineralogy of Mukdadiya Formation in Shewasoor Area: Northeastern Kirkuk City, Iraq.   journal   = {International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering}, [online]. World Academy of Science, Engineering and Technology. April 2016, vol. 112(4). 433 - 438[viewed 19 July 2018]. Available from: http://waset.org/publications/10004173.