National Cooperative Highway Research Program. Summary of progress - National Cooperative Highway Research Program 2005. Highway Research Board, National Research Council.
Chicago-viite (17. p.)National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2005. [Washington]: Highway Research Board, National Research Council.
MLA-viite (9. p.)National Cooperative Highway Research Program. Summary of Progress - National Cooperative Highway Research Program 2005. Highway Research Board, National Research Council.
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