United States. Department of Agriculture. (1956). Abstracts of recent published material on soil and water conservation. United States Department of Agriculture.
Chicago Style (17. basım) AtıfUnited States. Department of Agriculture. Abstracts of Recent Published Material on Soil and Water Conservation. Washington, D.C.: United States Department of Agriculture, 1956.
MLA (9th ed.) AtıfUnited States. Department of Agriculture. Abstracts of Recent Published Material on Soil and Water Conservation. United States Department of Agriculture, 1956.
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