Heavy Metal Content in Sediment and Hora Shell (Cerithidea obtusa) in Panipahan Waters, Rokan Hilir, Riau. JNI [Internet]. 2021 Oct. 22 [cited 2025 Apr. 21];19(2):29-36. Available from: https://ijae-unri.ejournal.unri.ac.id/index.php/natur/article/view/1668