00719pam a2200169 i 4500020001500000082002000015110003800035245019700073260005400270300003300324526003600357650004300393650000600436650003900442650003500481650003300516  a030902567200a625.8028bNAcD2 aNational Research Council (U.S.).10aMaintenance management, the Federal role, unionization, pavement maintenance, and ice control /cTransportation Research Board, Commission on Sociotechnical Systems, National Research Council.  aWashington :bNational Academy of Science,c1977.  aiii, 57 p. :bill. ;c28 cm.  a0b0c0d625_802800000000000_NA 0aCollective bargainingxTransportation. 0aD 0aPavementsxMaintenance and repair. 0aRoadsxMaintenance and repair. 0aRoadsxSnow and ice control.