WASET
    S. A. Nta and  M. J. Ayotamuno and  I. J. Udom,  Effect of Landfill Leachate on Engineering Properties of Test Soil.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2021, vol. 170(2). 87 - 91
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10011842.