Haryanti, Ninis Hadi, Suryajaya Suryajaya, Henry Wardhana, and Rijali Noor. “UTILIZATION OF COAL BOTTOM ASH AS BRIQUETTE MATERIAL”. Spektra: Jurnal Fisika dan Aplikasinya 4, no. 3 (December 30, 2019): 113–124. Accessed November 5, 2024. https://journal.unj.ac.id/unj/index.php/spektra/article/view/12038.