Kurtzig, M. E. (1974). Agricultural production and trade. U.S. Dept. of Agriculture, Economic Research Service.
Citace podle Chicago (17th ed.)Kurtzig, Michael E. Agricultural Production and Trade. [Washington]: U.S. Dept. of Agriculture, Economic Research Service, 1974.
Citace podle MLA (8th ed.)Kurtzig, Michael E. Agricultural Production and Trade. U.S. Dept. of Agriculture, Economic Research Service, 1974.
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