Pryor, C. A., Heins, C. P., & Looney, C. T. G. (1967). Statistical analysis of heavy truck traffic for the State of Maryland: Progress report : study of effect of new vehicle weight law on structures. University of Maryland, Civil Engineering Department.
Lua i Stíl Chicago (17ú heag.)Pryor, Charles A., Conrad P. Heins, agus Charles T. G. Looney. Statistical Analysis of Heavy Truck Traffic for the State of Maryland: Progress Report : Study of Effect of New Vehicle Weight Law on Structures. College Park, Md.: University of Maryland, Civil Engineering Department, 1967.
Lua MLA (8ú heag.)Pryor, Charles A., et al. Statistical Analysis of Heavy Truck Traffic for the State of Maryland: Progress Report : Study of Effect of New Vehicle Weight Law on Structures. University of Maryland, Civil Engineering Department, 1967.