PENGARUH SUBSTITUSI CAMPURAN LIMBAH GYPSUM DAN FLY ASH TERHADAP KARAKTERISTIK HOLLOW BLOCK. SNPPM [Internet]. 2024 Dec. 23 [cited 2026 Apr. 10];8:22-7. Available from: https://www.journal.ubb.ac.id/index.php/snppm/article/view/5993