Widodo S, Satyarno I, Tudjono S. Experimental Study on the Potential Use of Pumice Breccia as Coarse Aggregate in Structural Lightweight Concrete. ijscet. 2014;5(1):1-8. Accessed July 18, 2024. https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/783