Ojukwu, V.E., Igbokwe P.K, and Ugonabo, V.I. 2022. “Study of Effects of Groundnut Shell and Grog Additives on the Refractory Properties of Isiagu Clay”. COVENANT JOURNAL OF ENGINEERING TECHNOLOGY 6 (1). https://journals.covenantuniversity.edu.ng/index.php/cjet/article/view/3053.