Haefele, E. T. (1969). Transport and national goals. Washington, D.C: Brookings Institution.
Παραπομπή Chicago StyleHaefele, Edwin T. Transport and National Goals. Washington, D.C: Brookings Institution, 1969.
Παραπομπή MLAHaefele, Edwin T. Transport and National Goals. Washington, D.C: Brookings Institution, 1969.
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