Baerwald, J. E. (1976). Transportation and traffic engineering handbook. Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)Baerwald, John E. Transportation and Traffic Engineering Handbook. Englewood Cliffs: Prentice-Hall, 1976.
Tohutoro MLA (9th ed.)Baerwald, John E. Transportation and Traffic Engineering Handbook. Prentice-Hall, 1976.
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