185 resultados para Water conservation.


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"Reprinted from the Fourth annual report of the Commission of Conservation"

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At head of title: U.S. Dept. of the Interior.

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Study was made with the cooperation of U.S. Soil Conservation Service and North Carolina Dept. of Water Resources.

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Some parts are composed chiefly of statistical tables.

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"Reports dealing with ground-water conditions in New York": p. 91-93.

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Includes index.

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