D. Y. Bawa and  M. I. Ribah and  I. S. Jega and  V. O. Oyedepo,  Assessment of Physicochemical Characteristics and Heavy Metals Concentration in Freshwater from Jega River, Kebbi State, Nigeria.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2018, vol. 133(1). 38 - 41
    [viewed 22 January 2022]. Available from: https://publications.waset.org/pdf/10008771.