Lewis, D. L. (1999). Road user and mitigation costs in highway pavement projects. National Academy Press.
Lua i Stíl Chicago (17ú heag.)Lewis, David L. Road User and Mitigation Costs in Highway Pavement Projects. Washington, D.C: National Academy Press, 1999.
Lua MLA (9ú heag.)Lewis, David L. Road User and Mitigation Costs in Highway Pavement Projects. National Academy Press, 1999.
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