Hay, W. W. (1961). An introduction to transportation engineering. Wiley.
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Dyfyniad Arddull Chicago
Hay, William Walter. An Introduction to Transportation Engineering. New York: Wiley, 1961.
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Dyfyniad MLA
Hay, William Walter. An Introduction to Transportation Engineering. Wiley, 1961.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.