Não informado. (1975). Agricultural Outlook. U.S. Department of Agriculture, Economic Research Service.
Citace podle Chicago (17th ed.)Não informado. Agricultural Outlook. Washington: U.S. Department of Agriculture, Economic Research Service, 1975.
Citace podle MLA (8th ed.)Não informado. Agricultural Outlook. U.S. Department of Agriculture, Economic Research Service, 1975.
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