Visual materials on soil and water conservation. - United States. Department of Agriculture; United States. Soil Conservation Service ([Washington, D.C.] : U.S. Department of Agriculture, Soil Conservation Service, 1951)
"Issued August 1951."
Cover title.
Mode of access: Internet.
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Keywords: Water conservation -- United States -- Audio-visual aids -- Catalogs; Soil conservation -- United States -- Audio-visual aids -- Catalogs