Anmar A.M. Al-Talib, Dr., and Ruaa Faiz M. Gadawi. 2011. “OPTIMAL ECONOMICAL DESIGN OF MAIN IRRIGATION PIPE NETWORK FOR IRRIGATION PROJECTS”. Al-Rafidain Engineering Journal (AREJ) 19 (2):1-10. https://doi.org/10.33899/rengj.2011.27035.