WASET
    N. Z. Mohd Yunus and  D. Wanatowski and  L. R. Stace,  Effect of Humic Acid on Physical and Engineering Properties of Lime-Treated Organic Clay.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 724 - 729
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/2800.