WASET
    Kazeem K. Adewole and  Festus. A. Olutoge and  Hamzat Habib,  Effect of Nigerian Portland-Limestone Cement Grades on Concrete Compressive Strength.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2014, vol. 95(11). 1199 - 1202
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10000606.