“Study Addition of Bamboo Leaf Ash as a Substitute for Cement and Coconut Fiber as an Additive to the Compressive Strength of Concrete: Addition of Bamboo Leaf Ash as a Substitute for Cement and Coconut Fiber as an Additive to the Compressive Strength of Concrete” (2021) Teras, 11(3). Available at: https://ojs.unsiq.ac.id/index.php/teras/article/view/3162 (Accessed: 26 May 2026).