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

Bibliografiset tiedot
Yhteisötekijä:	National Research Council (U.S.). Transportation Research Board
Aineistotyyppi:	Kirja
Kieli:	englanti
Julkaistu:	Washington, D.C. Transportation Research Board, National Research Council [1990]
Sarja:	Transportation Research Circular Number 364
Aiheet:	Highway engineering > Research. Buses > Maintenance and repair > Research. Road machinery > Maintenance and repair > Research. Pavements > Maintenance and repair > Research.