“EFFECTS OF VARIABILITY IN THE POZZOLANIC PROPERTIES OF RICE HUSK ASH (RHA) ON THE COMPRESSIVE STRENGTH OF CONCRETE”. Nigerian Journal of Technology 35, no. 4 (October 1, 2016): 694–698. Accessed January 15, 2026. https://www.nijotech.com/index.php/nijotech/article/view/1197.