UmarH. A., AbubakarZ., and LimanA. Z. “STUDY INTO THE DRAIN DOWN CHARACTERISTIC OF SMA CONCRETE USING SANDSTONE AS MINERAL FILLER”. FUDMA JOURNAL OF SCIENCES 4, no. 1 (April 14, 2020): 250 - 260. Accessed March 29, 2024. https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/45.