“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). https://ojs.unsiq.ac.id/index.php/teras/article/view/3162.