PERBANDINGAN NILAI KALORI BATUBARA ANTARA HASIL BLENDING DAN HASIL ANALISA REGRESI LINIER. PROCEEDINGS OF NATIONAL COLLOQUIUM RESEARCH AND COMMUNITY SERVICE, [S. l.], v. 1, 2018. DOI: 10.33019/snppm.v1i0.543. Disponível em: https://journal.ubb.ac.id/index.php/snppm/article/view/543. Acesso em: 13 apr. 2026.