From

Review of Gully Erosion in Nigeria: Causes, Impacts and Possible Solutions

I. A. Abdulfatai, I. A. Okunlola, W. G. Akande, L. O. Momoh, K. O. Ibrahim

Journal of Geosciences and Geomatics. 2014, 2(3), 125-129 doi:10.12691/jgg-2-3-8