Adimassu, Z., B. Gorfu, D. Nigussie, J. Mowo, and K. Hilemichael. “Farmers’ Preference for Soil and Water Conservation Practices in Central Highlands of Ethiopia”. African Crop Science Journal, vol. 21, no. 1, Dec. 2013, pp. 781-90, doi:10.4314/acsj.v21i1.