00000cam a22000004i 4500 UP-99796217610395536 Buklod 20120704105627.0 m |q d | ta 801211s1980 dcu r |000 0|eng d (iLib)UPD-00187103678 na CU-IT NCTS LIBRARY National Research Council (U.S.). Transportation Research Board. Committee on Maintenance and Operations Personnel. Progress report on maintenance and operations personnel prepared by the TRB Committee on Maintenance and Operations Personnel with the cooperation of the AASHTO Subcommittee on Maintenance. Washington, D.C. Transportation Research Board 1980. [35] p. 28 cm. Transportation Research Circular Number 215 This report is the 36th in a series which began in 1944. January 1980 Highway departments United States Employees. Roads Maintenance and repair Personnel management. American Association of State Highway and Transportation Officials. Subcommittee on Maintenance. UPD NCTS Book