Heathington, K. W., & Tutt, P. R. (1966). Traffic volume analysis of urban freeways. Austin: Texas Highway Department : Department of Commerce.
Παραπομπή Chicago StyleHeathington, Kenneth W., and Paul R. Tutt. Traffic Volume Analysis of Urban Freeways. Austin: Texas Highway Department : Department of Commerce, 1966.
Παραπομπή MLAHeathington, Kenneth W., and Paul R. Tutt. Traffic Volume Analysis of Urban Freeways. Austin: Texas Highway Department : Department of Commerce, 1966.
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