Buhari, S., & Bello, A. (2023). DETERMINATION OF POTASSIUM AND SILICON FROM LEFT-OVER OF GOLD ORE USING PROTON INDUCED X-RAY EMISSION. FUDMA JOURNAL OF SCIENCES, 3(1), 273-279. http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/1453