Sumardi, Slamet, Mohammad Zaki Mubarok, Nuryadi Saleh, and F Firdiyono. 2012. “PELINDIAN REDUKTIF BIJIH MANGAN NUSA TENGGARA TIMUR DENGAN MENGGUNAKAN MOLASES DALAM SUASANA ASAM[Reductive Leaching of Manganese Ore from East Nusa Tenggara With Molasses in Sulfuric Acid Solution]”. Jurnal Metalurgi 27 (3):287-94. https://doi.org/10.14203/metalurgi.v27i3.239.