SHEA MING, TAN, Mohamad Luthfi Ahmad Jeni, Hilmi Kosnin, and Mohamad Hairi Osman. “Use of Palm Oil Boiler Bottom Ash As Replacement Materials in Concrete Mix”. Progress in Engineering Application and Technology 3, no. 2 (December 19, 2022): 183–191. Accessed July 18, 2024. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6240.