Research problem statements operation, safety and maintenance of transportation facilities.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	National Research Council (U.S.). Transportation Research Board
Fformat:	Llyfr
Iaith:	Saesneg
Cyhoeddwyd:	Washington, D.C. Transportation Research Board, National Research Council [1990]
Cyfres:	Transportation Research Circular Number 364
Pynciau:	Highway engineering > Research. Buses > Maintenance and repair > Research. Road machinery > Maintenance and repair > Research. Pavements > Maintenance and repair > Research.