Field discharge calibration of head regulators, Mirpurkhas Sub-division, Jamrao Canal, Nara Circle, Sindh Province, Pakistan - Khan, A.H.; Skogerboe, G.V.; Siddiqui, R.; Lashari, Bakhshal K.; Jalbani, Z.H.; Khuwaja, M.A.; Memon, M.H.; Khokhar, W.H. (International Irrigation Management Institute, 1998)