Umasabor, Richie, and Augustine . I. Agbonaye. “The Effect of Fly Ash As Partial Replacement of Cement on the Compressive Strength of Concrete”. NIPES - Journal of Science and Technology Research 5, no. 4 (December 22, 2023). Accessed September 19, 2024. https://journals.nipes.org/index.php/njstr/article/view/792.