Contamination Status of Lead (Pb) And Copper (Cu) Heavy Metals On The Surface Of The Sediment At Sampur Beach, Central Bangka. JTMS [Internet]. 2023 Oct. 11 [cited 2026 Apr. 12];6(2):137-46. Available from: https://journal.ubb.ac.id/index.php/jtms/article/view/4806