967 resultados para Soil conservation districts
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Shipping list no.: 2004-0058-P.
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"October 1936."
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"August 1938."
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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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A study of soil erosion on the Honey Hollow creek watershed, Bucks County, Pennsylvania.
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A study of soil erosion on the Honey Hollow creek watershed, Bucks County, Pennsylvania.
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Contribution from Soil Conservation Service.
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"Issued May 1946 ; Slightly rev. Apr. 1948."
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"October 1949."
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"Issued September 1949"--P. 2.
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