SulaimanTasiu Ashiru, and AliyuI. 2020. “COMBINED EFFECT OF RICE HUSK ASH AND CEMENT KILN DUST AS CEMENT REPLACEMENT MATERIALS IN CONCRETE”. FUDMA JOURNAL OF SCIENCES 4 (1), 446 -52. https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/66.