“PROSES BRAZING Cu-Ag BERBAHAN BAKAR BIOGAS TERMURNIKAN”. Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam 14, no. 2 (October 1, 2009): 105–120. Accessed July 1, 2026. https://ejournal-science.upi.edu/jpmipa/article/view/386.