Locklin, P. (1960). Economics of transportation (5th ed., 1st printing.). Richard D. Irwin.
Cita Chicago Style (17a ed.)Locklin, Philip. Economics of Transportation. 5th ed., 1st printing. Homewood (Illinois): Richard D. Irwin, 1960.
Cita MLA (9a ed.)Locklin, Philip. Economics of Transportation. 5th ed., 1st printing. Richard D. Irwin, 1960.
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