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Donor
- Naff, Thomas 109
- Kolars, John F. 1
Topic
- Irrigation 113
- Agriculture 73
- Groundwater 33
- Water quality 26
- Technology 24
- Watersheds 24
- Water consumption 20
- Economics 18
- Hydrology 17
- Finance 15
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Publisher
- Food and Agriculture Organization of the United Nations 15
- International Commission on Irrigation and Drainage 9
- Pergamon Press (Oxford, England) 8
- United Nations Development Programme 5
- United Nations 5
- United States. Joint Publications Research Service 5
- Kollek and Sons Ltd. 4
- Jordan. Sulṭat al-Maṣādir al-Ṭabīʻīyah 3
- Robert S. Kerr Environmental Research Laboratory 3
- American University (Washington, D.C.) 2
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Decade
- 1970-1979 113