Permana, Sulaksana, Shiva Frida Vincia, Anggita Amilia, Ahmad Maksum, Kurnia Setiawan Widana, and Johny Wahyuadi Soedarsono. “Enrichment on Bangka Tin slag’s Tantalum and Niobium Oxide Contents through Non-Fluoride Process”. Eastern-European Journal of Enterprise Technologies 5, no. 12 (95) (October 26, 2018): 56–64. Accessed July 28, 2024. https://journals.uran.ua/eejet/article/view/129914.