MODEL FOR PREDICTING MIX FORMULATION IN THE PRODUCTION OF INSULATING REFRACTORY BRICKS USING NIGERIAN FIRE-CLAYS AND COCONUT SHELL. NIJOTECH [Internet]. 2019 Jun. 28 [cited 2026 Apr. 17];38(3):654-9. Available from: https://nijotech.com/index.php/nijotech/article/view/2055