Bañares, A. C. B., and M. L. C. Alvarez. “DETECTION OF THE PRESENCE AND CONCENTRATION OF HEAVY METALS IN SELECTED RIVERS IN THE PROVINCE OF SAMAR”. International Journal of Research -GRANTHAALAYAH, vol. 3, no. 9, Sept. 2015, pp. 70-86, doi:10.29121/granthaalayah.v3.i9.2015.2955.