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Abdul Majid, Rafdi and Permanana, S and Soedarsono, J.W and Rachel, Debby and Kartika, Wahyu and Darnengsih, D and Munira, Munira and Mustafiah, M (2019) Peningkatan Kadar Tantalum & Niobium Oksida dari Terak Timah Bangka Menggunakan Pelarut NaOH dilanjutkan dengan HNO3 dan H3PO4. Journal of Chemical Process Engineering, 4 (2). pp. 84-89. ISSN 2655 2967