官方藏书 / Engineering_and_Technology / Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 / Locomotive Performance On Grades Of Various Lengths, Paper No. 1172
官方藏书 / Engineering_and_Technology / Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 / Locomotive Performance On Grades Of Various Lengths, Paper No. 1172