461561 Kirby, R. F. (1974). Road user charges - some practical considerations. Washington : Urban Institute.
Chicagoスタイル(17版)引用形式461561 Kirby, Ronald F. Road User Charges - Some Practical Considerations. Washington : Urban Institute, 1974.
MLA(9版)引用形式461561 Kirby, Ronald F. Road User Charges - Some Practical Considerations. Washington : Urban Institute, 1974.
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