Marpaung, Petrus, LOLOM HUTABARAT, and Setiyadi Setiyadi. “Pemanfaatan Limbah Cangkang Kerang Dan Abu Jerami Sebagai Substitusi Parsial Terhadap Kuat Tekan Beton”. Journal of Sustainable Civil Engineering (JOSCE) 5, no. 02 (October 16, 2023): 102-108. Accessed May 14, 2025. https://lppm-unbaja.ac.id/ejournal/index.php/josce/article/view/2639.