Kebede, T., and Y. Ademe. “Assessment of the Perception of Development Agents on the Impact of Integrated Watershed Development Practices on Yield and Land Productivity in SNNPRS, Ethiopia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 30, no. 2, Nov. 2016, pp. 274-85, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6167.