WASET
    Hayder H. Kareem and  Shunqi Pan ,  Modelling of Groundwater Resources for Al-Najaf City, Iraq.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 110(2). 191 - 201
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10003691.