Haya, Arbi, Wawan Ak Conoras, and Firman Firman. 2019. “PENYEBARAN ENDAPAN NIKEL LATERIT PULAU OBI KABUPATEN HALMAHERA SELATAN PROVINSI MALUKU UTARA”. Journal Of Science and Engineering 2 (1). https://doi.org/10.33387/josae.v2i1.1657.