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Clapham, J. (1930). An economic history of modern Britain: The early railway age 120-1850 (2nd ed.). London: Cambridge University Press.

Clapham, J.H. An Economic History of Modern Britain: The Early Railway Age 120-1850. 2nd ed. London: Cambridge University Press, 1930.

Clapham, J.H. An Economic History of Modern Britain: The Early Railway Age 120-1850. 2nd ed. London: Cambridge University Press, 1930.