Rafdinal, R., Linda, R. ., Tavita, G. eva ., Kurniadi, B., & Aritonang, A. B. (2022). Analysis of Lead (Pb) Heavy Metal Content in Tengkuyung Snail (Cerithidea obtuse) and Sediment in the Kuala Mangrove Area of Singkawang City. Jurnal Biologi Tropis, 22(4), 1378–1383. https://doi.org/10.29303/jbt.v22i4.4403