Bañares, A. C. B. and Alvarez, M. L. C. (2015) “DETECTION OF THE PRESENCE AND CONCENTRATION OF HEAVY METALS IN SELECTED RIVERS IN THE PROVINCE OF SAMAR”, International Journal of Research -GRANTHAALAYAH, 3(9), pp. 70–86. doi: 10.29121/granthaalayah.v3.i9.2015.2955.