1. , , . 1996. Water conservation definitions from a hydrologic viewpoint. Proceedings North American Water and Environment Congress, ASCE, Anaheim, Calif.
2. , . 1997. Water use definitions and their use for assessing the impacts of water conservation. In Proceedings ICID Workshop on Sustainable Irrigation in Areas of Water Scarcity and Drought, de Jager JM, Vermes LP, Ragab R (eds), Oxford, England, 11–12 Sept.; 72–82.
3. . 1974. On Irrigation Efficiencies, 1st edn. International Institute for Land Reclamation and Improvement: Wageningen, The Netherlands; 95 pp.
4. . 1982. On Irrigation Efficiencies, 3rd edn. International Institute for Land Reclamation and Improvement: Wageningen, The Netherlands; 142 pp.
5. FAO. 1996. http://www.fao.org/DOCREP/003/W2612E/w2612e07a.html [October 1995].