Azahar, Anis Faezah, and Noor Khazanah A. Rahman. 2021. “A Study on Properties of Concrete As a Potential Innovative of Coarse Aggregate With Coconut Shell”. Progress in Engineering Application and Technology 2 (1): 361-72. https://penerbit.uthm.edu.my/periodicals/index.php/peat/article/view/768.