Greenwald, W. I., & Hultgren, T. (1953). Transport and the state of trade in Britain. National Bureau of Economic Research.
Citace podle Chicago (17th ed.)Greenwald, William I., a Thor Hultgren. Transport and the State of Trade in Britain. New York: National Bureau of Economic Research, 1953.
Citace podle MLA (9th ed.)Greenwald, William I., a Thor Hultgren. Transport and the State of Trade in Britain. National Bureau of Economic Research, 1953.
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