1 Al-Tahir, O. A.; Al-Nabulsi, Y. A.; Helalia, A. M.. 1997. Effects of water quality and frequency of irrigation on growth and yield of barley (Hordeum vulgare L.) Agricultural Water Management, 34(1):17-24.
(Location: IWMI-HQ Call no: PER Record No: H021013)
2 Helalia, A. M.; Al-Tahir, O. A.; Al-Nabulsi, Y. A. 1996. The influence of irrigation water salinity and fertilizer management on the yield of Alfalfa (Medicago sativa L.) Agricultural Water Management, 31(1/2):105-114.