1. Allen, R.G., Pereira, D., Raes, D. & Smith, M. 1998. Crop evapotranspiration. FAO Irrigation and Drainage Paper No 56, FAO, Rome.
2. DDAC. 2000. Dire Dawa Administrative Council Water Mines and Energy Office water sector review report. Dire Dawa, Ethiopia.
3. Faci, J.M., Bensaaci, A., Slatni, A. & Playan, E. 2000. A case study for modernization: Characterization of the district and analysis of water delivery records. Agricultural Water Management 42(I): 313–334.
4. Hart, W.E., Collins, H.G., Woodward, G. & Humpherys, A.S. 1983. Design and operation of gravity or surface systems. In: Design and Operation of Farm Irrigation Systems. ASAE Monograph.
5. Karmeli, D., Slazar, L.J. & Walker, W.R. 1978. Assessing the Spatial Variability of Irrigation Water Application. Oklahoma, USA.