Bekele, A., Viljoen, F. and Ayele, G. 2006. Effect of farm size on technical efficiency of TEF production: a case study of the Moretna-Jirru district, central Ethiopia. Ethiopian Journal of Development Research. 27, 1 (Dec. 2006), 1–24. DOI:https://doi.org/10.4314/ejdr.v27i1.38630.