Não informado. (1941). Crop Production. Department of Agriculture, Statistical Reporting Service.
Čikaški stil citiranja (17. izdanje)Não informado. Crop Production. Washington: Department of Agriculture, Statistical Reporting Service, 1941.
MLA način citiranja (8. izdanje)Não informado. Crop Production. Department of Agriculture, Statistical Reporting Service, 1941.
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