Terefe, Aemro T., and Musa H. Ahmed. “DRIVING FORCE OF ORGANIC FERTILIZER USE IN CENTRAL RIFT VALLEY OF ETHIOPIA: INDEPENDENT DOUBLE HURDLE APPROACH”. Ekonomika poljoprivrede 63, no. 4 (December 31, 2016): 1265–1279. Accessed April 6, 2025. https://ea.bg.ac.rs/index.php/EA/article/view/158.