共 13 条
[1]
ACWORTH WM, ELEMENTS RAILWAY EC, P50
[3]
*BUR ACC COST, 248 BUR ACC COST US, P89
[4]
DANIELS WM, 1932, PRICE TRANSPORTATION, P69
[5]
JONES E, 1931, PRINCIPLES RAILWAY T, P71
[6]
LORENZ MO, 1916, Q J ECON, V30, P209
[8]
RIPLEY WZ, 1927, RILROADS RATES REGUL
[10]
WELLINGTON AM, 1893, EC THEORY LOCATION R, P109