Public transit risk management : a handbook for public transit executives - Ryland, V. Wallace (Washington : U.S. Dept of Transportation, Urban Mass Transportation Administration, 1978)
Report no. UMTA-IT-06-0173-79-1
Con: Alternatives for optimization of aggregate and pavement properties related to friction and wear resistance / S.H. Dahir and J.M. Rice. Washington : Federal Higway Administration, 1978.
Keywords: SEALES DE TRANSITO -- FINANZAS; SEALES DE TRANSITO