483 resultados para Civilian Conservation Corps (U.S.)
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Contribution from Soil Conservation Service.
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"The greater part of the material used was selected from the files of the Work Projects Administration Erosion history project, 701-2-240, Columbia, S.C."--Foot-note, p. 1.
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Contribution from Soil Conservation Service.
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Cover title.
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Contribution from Soil Conservation Service.
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"Soil Conservation Service and Bureau of Agricultural Economics, U.S. Dept. of Agriculture, in cooperation with the Iowa Agricultural Experiment Station."
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"August 1981."
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Includes bibliographical references.
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"U.S. Dept. of Agriculture in cooperation with the Agricultural Experiment Station, University of Puerto Rico."
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Contribution from Soil Conservation Service.
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"Issued May 1946 ; Slightly rev. Apr. 1948."
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"Issued December 1949."
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"October 1949."
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Cover title.
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Cover title.