Cain, "Transportation", Economic Sectors, vol. 4 of Historical Statistics of the United States: Milliennial Edition, 770.
58
Там же.
59
Albert Fishlow, American Railroads and the Transformation of the Antebellum Economy (Cambridge, MA: Harvard University Press, 1965); Robert Fogel, Railroads and American Economic Growth (Baltimore: Johns Hopkins University Press, 1964).
