Wudnesh Naba, et al. “Demonstrative Study of the Effectiveness of Low Cost Gully Rehabilitation Measures: The Case of Bonke District SNNPR, Ethiopia”. Global Journal of Science Frontier Research, vol. 20, no. D4, Mar. 2020, pp. 17-22, https://journalofscience.org/index.php/GJSFR/article/view/2677.