WASET
    Kazeem K. Adewole and  Gbenga. M. Ayininula and  Wasiu O. Ajagbe and  Olabisi Akinade,  Effect of the Portland-Limestone Cement Grades on the Compressive Strength of Hollow Sandcrete Blocks.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2014, vol. 90(6). 762 - 766
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/9998794.