Não informado. (1919). Foreign crops and markets. U.S. Department of Agriculture, Foreign Agricultural Service.
Čikaški stil citiranja (17. izdanje)Não informado. Foreign Crops and Markets. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1919.
MLA način citiranja (8. izdanje)Não informado. Foreign Crops and Markets. U.S. Department of Agriculture, Foreign Agricultural Service, 1919.
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