Research problem statements

Research problem statements

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Manylion Llyfryddiaeth
Awdur Corfforaethol: National Research Council (U.S.). Transportation Research Board
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Washington, D.C. The Board 1980.
Cyfres:Transportation Research Circular Number 217
Pynciau:
Highway research > United States.
Roads > Design and construction. > Research > United States.