Fogel, R. W. (1964). Railroads and American economic growth: Essays in econometric history. Johns Hopkins Press.
Lua i Stíl Chicago (17ú heag.)Fogel, Robert William. Railroads and American Economic Growth: Essays in Econometric History. Baltimore: Johns Hopkins Press, 1964.
Lua MLA (8ú heag.)Fogel, Robert William. Railroads and American Economic Growth: Essays in Econometric History. Johns Hopkins Press, 1964.
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