WASET
    M. Ghazy and  T. Dockhorn and  N. Dichtl,  Sewage Sludge Management in Egypt: Current Status and Perspectives towards a Sustainable Agricultural Use.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2009, vol. 33(9). 270 - 278
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/13648.