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MLA

Vocke, Gary, and United States Department of Agriculture. Economic Research Service. Wheat : background and issues for farm legislation. USDA, Economic Research Service, 2001.

APA

Vocke, Gary, and United States Department of Agriculture. Economic Research Service. (2001). Wheat : background and issues for farm legislation. USDA, Economic Research Service.

Chicago

Vocke, Gary., and United States Department of Agriculture. Economic Research Service. Wheat : background and issues for farm legislation. USDA, Economic Research Service, 2001.