G. G. . Bernales, C. M. . Calo, C. M. Dumago, A. Tibe, M. Barbon, and D. M. Altar, “Analysis of Heavy Metal (Hg, Pb, Ni) Content in Marsh Clam, Polymesoda expansa Collected from Butuan Bay, Philippines”, IJBPCS, vol. 4, no. 1, pp. 14–23, Apr. 2022.