Kweyunga, C., and R. B. M. RBM Senzota. “Impact of Small Scale Gold Mining on Soils of the Wetland Forests in East Usambara, Tanzania”. Tanzania Journal of Science, vol. 33, no. 1, Apr. 2021, pp. 67-78, https://tjs.udsm.ac.tz/index.php/tjs/article/view/356.