irrigation efficiency Kitapları
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Bexar-Medina-Atascosa Counties Small Watershed Project & Small Watershed Rehabilitation Amendments of 1999
United States. Congress. House. Committee on Agriculture. Subcommittee on General Farm Commodities, Resource Conservation, and Credit.
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Encyclopedia of water science
Stanley Wayne Trimble
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Sustainable irrigation management, technologies and policies
G. Lorenzini
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