Ubi, S.E, P.O Nkra, R.B Agbor, D.E Ewa, and M. Nuchal. “EFFICACY OF BASALT AND GRANITE AS COARSE AGGREGATE IN CONCRETE MIXTURE”. International Journal of Engineering Technologies and Management Research 7, no. 9 (September 8, 2020): 1–9. Accessed April 26, 2024. https://www.granthaalayahpublication.org/ijetmr-ojms/ijetmr/article/view/01_IJETMR20_A08_2167.