Begum, S. A., Banu, Q., & Hoque, B. (2013). Histopathology of stomach tissue of catfish magur, Clarias batrachus L. under chromium, cadmium and mercury stress. Chittagong University Journal of Biological Sciences, 5(1), 09–17. https://doi.org/10.3329/cujbs.v5i1.13365