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Texas Natural Resource Conservation Commission
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United States. Forest Service
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NetLibrary, Inc
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United States. Congress. Senate. Committee on Energy and Natural Resources
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United States. Bureau of Land Management
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Texas Agricultural Experiment Station
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ebrary, Inc
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United States. Agricultural Adjustment Administration
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National Renewable Energy Laboratory (U.S.)
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United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment
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United States. Department of Agriculture
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EBSCOhost
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United States. Congress. House. Committee on Agriculture
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United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans
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Texas Energy Extension Service
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Food and Agriculture Organization of the United Nations
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American Society of Agricultural Engineers
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International Union for Conservation of Nature and Natural Resources
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Pacific Northwest Research Station (Portland, Or.)
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United States. Bureau of Soils
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