Gilbert, M. (1958). Comparative national products and price levels: A study of Western Europe and the United States. Organisation for European Economic Cooperation.
Chicago-viite (17. p.)Gilbert, Milton. Comparative National Products and Price Levels: A Study of Western Europe and the United States. Paris: Organisation for European Economic Cooperation, 1958.
MLA-viite (9. p.)Gilbert, Milton. Comparative National Products and Price Levels: A Study of Western Europe and the United States. Organisation for European Economic Cooperation, 1958.
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