Qolbi GN, Gunawan B, Sugandi YS. ALTERNATIF KEBIJAKAN UNTUK FLY ASH AND BOTTOM ASH (STUDI KASUS: PP NO. 22 TAHUN 2021). SJR [Internet]. 2023Jul.1 [cited 2026Oct.7];6(3):502-1. Available from: https://ojspustek.org/index.php/SJR/article/view/691