Taylor, G. R., & Neu, I. D. (1956). The American railroad network 1861-1890. Cambridge, Mass: Harvard University Press.
Παραπομπή Chicago StyleTaylor, George Rogers, and Irene D. Neu. The American Railroad Network 1861-1890. Cambridge, Mass: Harvard University Press, 1956.
Παραπομπή MLATaylor, George Rogers, and Irene D. Neu. The American Railroad Network 1861-1890. Cambridge, Mass: Harvard University Press, 1956.
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