Permana, S., J. W. Soedarsono, A. Rustandi, A. Maksum, and I. Susanto. 2021. “Other Oxides Pre-Removed from Bangka Tin Slag to Produce a High Grade Tantalum and Niobium Oxides Concentrate: An Advance Study ”. New Ideas Concerning Science and Technology Vol. 9, March, 147-58. https://doi.org/10.9734/bpi/nicst/v9/6887D.