United States. Department of Agriculture. (1956). Abstracts of recent published material on soil and water conservation. United States Department of Agriculture.
Chicagoスタイル(17版)引用形式United States. Department of Agriculture. Abstracts of Recent Published Material on Soil and Water Conservation. Washington, D.C.: United States Department of Agriculture, 1956.
MLA(9版)引用形式United States. Department of Agriculture. Abstracts of Recent Published Material on Soil and Water Conservation. United States Department of Agriculture, 1956.
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