Ogueji, O. E., Usman, I. B., & Jehu, A. (2013). Investigation of acute toxicity of chlorpyrifos-ethyl on Clarias gariepinus – (Burchell, 1822) using some behavioural indices. International Journal of Basic and Applied Sciences, 2(2), 176-183. https://doi.org/10.14419/ijbas.v2i2.778