Analisa Hasil Pencucian Bijih Timah Pada Harz Jig Dalam Menurunkan Kadar Timah (Sn) Pada Tailing Di PT Timah (Persero) Tbk. Unit Kundur, Kepulauan Riau: The Analysis of Tin Ore Leaching Products of Harz Jig In Reducing Tin Tailing Levels In Kundur Unit of Riau Archipelago. PROMINE 2018, 4 (2). https://doi.org/10.33019/promine.v4i2.110.