Indryati S, Hidayat AE, Pratama AA, Laksamana RI, Widana KS, Ramlan MA, et al. Analytical Method Validation of Thorium in Ore Sample Using UV-Vis Spectrophotometer. Eksplorium: Bul. Pus. Bang. BGN [Internet]. 2024 Feb. 21 [cited 2025 Dec. 14];44(2):75-80. Available from: https://ejournal.brin.go.id/eksplorium/article/view/8173