300 resultados para Soil Conservation
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Cover title.
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"March 1985"--P. 2.
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"March 1985"--P. 2.
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Rev. and supplemented list originally published in Sept., 1937.
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Description based on: No. 4 (Nov. 1950); title from cover.
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Mode of access: Internet.
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"Issued August 1953" -- p. 1.
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"January 1990"--P. iii.
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Mode of access: Internet.
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"Issued November 1959".
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"In cooperation with South Dakota Agricultural Experiment Station."
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Prepared in cooperation with Texas Agricultural Experiment Station.
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Cover title.
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"March, 1991."
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Report includes appendices, survey report.