Richie I. Umasabor and Effort O. Osayogie. “Effect of Coarse Aggregate Sizes on the Compressive Strength of Concrete Using Response Surface Methodology”. NIPES - Journal of Science and Technology Research 2, no. 1 (March 2, 2020). Accessed December 22, 2024. https://journals.nipes.org/index.php/njstr/article/view/90.