(1950). Highway capacity manual: Practical applications of research. Washington, D.C: Government Printing Office.
Παραπομπή Chicago StyleHighway Capacity Manual: Practical Applications of Research. Washington, D.C: Government Printing Office, 1950.
Παραπομπή MLAHighway Capacity Manual: Practical Applications of Research. Washington, D.C: Government Printing Office, 1950.
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