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- Reservoirs 18
- Watersheds 8
- Groundwater 7
- Irrigation 7
- Dams 5
- Agriculture 4
- Building 4
- Hydrology 4
- Water quality 4
- Aquifers 3
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Publisher
- United Nations 3
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- Agrar- und Hydrotechnik GmbH (Essen, Germany) 1
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- Lebanon. Maṣlaḥah al-Waṭanīyah li-Nahr al-Līṭānī 1
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Repository
- Oregon State University. Libraries 18
Decade
- 1970-1979 18