Zakir, HM, M Moshfiqur Rahman, A Rahman, I Ahmed, and MA Hossain. 2013. “Heavy Metals and Major Ionic Pollution Assessment in Waters of Midstream of the River Karatoa in Bangladesh”. Journal of Environmental Science and Natural Resources 5 (2):149-60. https://doi.org/10.3329/jesnr.v5i2.14806.