N.S. Nzeh, and S. B. Hassan. “Gravity Separation And Leaching Beneficiation Study On Azara Nassarawa Barite Mineral Ore”. Global Journals of Research in Engineering 17, no. J5 (October 15, 2017): 41–46. Accessed April 28, 2024. https://engineeringresearch.org/index.php/GJRE/article/view/1722.