Sarauta, A., A. Sabo, I. A. Abdulhamed, and Y. O. Yusuf. 2015. “Assessment of Persistent Organic Pollutants in Water Samples from River Challawa in Kano, Nigeria”. World Journal of Environmental Research 5 (2):159-77. https://doi.org/10.18844/wjer.v5i2.163.