973 resultados para Michigan. Dept. of Conservation


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Shipping list no.: 1998-0152-P.

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"PHC-1-24."

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"PHC-2-24."

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Includes bibliographical references (p. 82).

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"February 1938."

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Contribution from Forest 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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"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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"U.S. Dept. of Agriculture in cooperation with the Agricultural Experiment Station, University of Puerto Rico."

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"Issued May 1946 ; Slightly rev. Apr. 1948."

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Mode of access: Internet.