UdumaA. U.; JacobA. G.; UdumaM. B. ENERGY DISPERSIVE X-RAY FLUORESCENCE ANALYSIS (EDXFA) OF TIN CONTENT IN CASSITERITE OBTAINED FROM RAY-FIELD MINING SITE, JOS. FUDMA JOURNAL OF SCIENCES, v. 1, n. 1, p. 185 - 188, 12 Mar. 2023.