Design Development of Spate Irrigation Structures in Raya Valley, Ethiopia. Global Journal of Science Frontier Research, [S. l.], v. 15, n. D5, p. 87–91, 2015. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/1513. Acesso em: 15 aug. 2026.