Hidayat, Syamsul, Sri Yulianti, Dian Anggreini, and Syamsul Bahtiar. “Study of Nickel Leaching Using Sulfuric Acid and Phosphoric Acid on The Selectivity Nickel Ore”. Jurnal Pijar Mipa 16, no. 3 (June 2, 2021): 393–396. Accessed November 22, 2024. http://jurnalfkip.unram.ac.id/index.php/JPM/article/view/2602.