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الإتاحة
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المؤلفين
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أنواع المادة
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مواقع
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السلاسل
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مواضيع
- Adaptive natural res...
- Irrigation engineeri...
- Solar pumps
- Sustainable developm...
- Water
- Water and civilizati...
- Water resources deve...
- Water resources deve...
- Water resources deve...
- Water supply enginee...
- Water-supply
- Water-supply enginee...
- Water-supply enginee...
- Water-supply enginee...
- Water-supply, Rural ...
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